JPH0672059B2 - High corrosion resistance sintered body - Google Patents
High corrosion resistance sintered bodyInfo
- Publication number
- JPH0672059B2 JPH0672059B2 JP63249786A JP24978688A JPH0672059B2 JP H0672059 B2 JPH0672059 B2 JP H0672059B2 JP 63249786 A JP63249786 A JP 63249786A JP 24978688 A JP24978688 A JP 24978688A JP H0672059 B2 JPH0672059 B2 JP H0672059B2
- Authority
- JP
- Japan
- Prior art keywords
- zrb
- weight
- sintered body
- less
- tic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007797 corrosion Effects 0.000 title claims description 20
- 238000005260 corrosion Methods 0.000 title claims description 20
- 239000000843 powder Substances 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 16
- 238000005245 sintering Methods 0.000 claims description 11
- 239000011651 chromium Substances 0.000 description 21
- 230000003647 oxidation Effects 0.000 description 12
- 238000007254 oxidation reaction Methods 0.000 description 12
- 230000003628 erosive effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000035939 shock Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910016006 MoSi Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910006249 ZrSi Inorganic materials 0.000 description 2
- -1 ZrSi 2 Chemical compound 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000001272 pressureless sintering Methods 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical class [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ZrB2とCr3C2を含んでなる混合原料粉末を焼
結してなる高耐食性焼結体に関するものである。ZrB
2は、高融点、高硬度、高耐食性であり、しかも導電性
を有するために有望な材料と考えられるが、極めて難焼
結性であるのでほとんど実用化されていない。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a highly corrosion resistant sintered body obtained by sintering a mixed raw material powder containing ZrB 2 and Cr 3 C 2 . ZrB
2 is considered to be a promising material because it has a high melting point, high hardness, high corrosion resistance, and electrical conductivity, but it is hardly practically used because it is extremely difficult to sinter.
本発明の高耐食性焼結体は、ZrB2の上記特性を損わずに
耐酸化性に優れたものであるため、溶融金属に対する耐
食性部材、機械部品、発熱体、電極等での用途が期待さ
れるものである。The highly corrosion-resistant sintered body of the present invention is excellent in oxidation resistance without impairing the above-mentioned properties of ZrB 2 , and therefore is expected to be used as a corrosion-resistant member for molten metal, machine parts, heating elements, electrodes, etc. It is what is done.
ZrB2を含む焼結体については古くから研究されており、
特許出願もかなりある（例えば特開昭61−12848号公
報）。Sintered bodies containing ZrB 2 have been studied for a long time,
There are quite a few patent applications (for example, Japanese Patent Laid-Open No. 61-12848).
すなわち、ZrB2焼結体を得るには、焼結助剤としてMoSi
2，ZrSi2などの珪化物、TaN,HfNなどの窒化物、ZrO2な
どの酸化物、SiC,B4Cなどの炭化物及び金属粉などを添
加して焼結することが知られている。That is, in order to obtain a ZrB 2 sintered body, MoSi as a sintering aid is used.
2 , it is known to add silicide such as ZrSi 2 , nitride such as TaN and HfN, oxide such as ZrO 2 , carbide such as SiC and B 4 C, and metal powder, and sinter.
しかし、MoSi2，ZrSi2などの珪化物は高温下で分解し易
く、強度、耐食性、耐酸化性に劣る。窒化物は一般に硬
度、強度は良いが、耐酸化性、耐熱衝撃性、耐食性が充
分でない。酸化物ではZrO2が挙げられるが正方晶単斜
晶転移により高温酸化性雰囲気下での使用では強度低下
が起こるだけでなく耐酸化性の点で問題が残る。炭化物
としてはSiC,B4C等が開示されているが耐酸化性が不充
分である。However, silicides such as MoSi 2 and ZrSi 2 are easily decomposed at high temperatures and are inferior in strength, corrosion resistance and oxidation resistance. Nitride generally has good hardness and strength, but is not sufficient in oxidation resistance, thermal shock resistance, and corrosion resistance. As the oxide, ZrO 2 can be mentioned, but when used in a high temperature oxidizing atmosphere due to the tetragonal monoclinic transition, not only the strength is lowered but also the problem of oxidation resistance remains. Although SiC, B 4 C and the like are disclosed as carbides, their oxidation resistance is insufficient.
以上のように、従来の焼結助剤では幾つかの欠点を有す
るため、ZrB2の特徴を充分に生かした形での実用化はま
だ実現していない。本発明はこれらの点を解決すること
を目的とするものである。As described above, since the conventional sintering aids have some drawbacks, they have not yet been put into practical use in a form that makes full use of the characteristics of ZrB 2 . The present invention aims to solve these problems.
すなわち、本発明は、以下を要旨とする高耐食性焼結体
である。That is, the present invention is a highly corrosion resistant sintered body having the following features.
1.実質的にZrB2とCr3C2からなり、その重量比がZrB2：C
r3C2＝99.5〜50:0.5〜50で合計100であるものを含有し
てなる混合原料粉末を焼結して得られたものであって、
本質的にSi-Al-O-N相を有しないものであることを特徴
とする高耐食性焼結体。1. It consists essentially of ZrB 2 and Cr 3 C 2 , and its weight ratio is ZrB 2 : C.
r 3 C 2 = 99.5 to 50: 0.5 to 50, obtained by sintering a mixed raw material powder containing 100 in total,
A highly corrosion-resistant sintered body characterized by having essentially no Si-Al-ON phase.
2.混合原料粉末が、BN,AIN,B4C,SiC及びTiCから選ばれ
た少なくとも１種をそれらの合計で50重量％以下をさら
に含有してなり、しかも、BNについては40重量％以下、
AlNとB4Cについては各々25重量％以下、SiCとTiCについ
ては各々15重量％以下であることを特徴とする請求項１
記載の高耐食性焼結体。以下、さらに詳しく本発明につ
いて説明する。本発明に用いられる原料は次のとおりで
ある。「実質的」とは、ZrB2とCr3C2は必ずしも純度が1
00％でなくともよいことを意味し、例えばCr3C2にはCr7
C3,Cr4C等の炭化クロム化合物やCr,Cが含まれていても
よい。ZrB2とCr3C2は共に純度99％以上、平均粒径10μ
ｍ以下好ましくは１μｍ以下である。また、第３成分と
して含ませることもあるBN,AlN,B4C,SiC,TiCについても
純度99％以上で平均粒径10μｍ以下が好ましい。原料の
混合は乾式、湿式のいずれも採用できる。混合原料粉末
の粒度としては10μｍ以下好ましくは５μｍ以下であ
る。2. The mixed raw material powder further contains at least one selected from BN, AIN, B 4 C, SiC, and TiC in a total amount of 50% by weight or less, and 40% by weight or less for BN. ,
Amounts of AlN and B 4 C are each 25% by weight or less, and SiC and TiC are each 15% by weight or less.
Highly corrosion-resistant sintered body as described. The present invention will be described in more detail below. The raw materials used in the present invention are as follows. “Substantially” means that ZrB 2 and Cr 3 C 2 do not necessarily have a purity of 1.
Meaning that it does not have to be 00%, for example Cr 7 for Cr 3 C 2
Chromium carbide compounds such as C 3 and Cr 4 C and Cr and C may be contained. Both ZrB 2 and Cr 3 C 2 have a purity of 99% or more and an average particle size of 10μ.
m or less, preferably 1 μm or less. Further, BN, AlN, B 4 C, SiC, and TiC which may be contained as the third component also preferably have a purity of 99% or more and an average particle size of 10 μm or less. The raw materials can be mixed either dry or wet. The particle size of the mixed raw material powder is 10 μm or less, preferably 5 μm or less.
焼結条件は、常圧焼結法、ホットプレス法、HIP（熱間
静水圧）法のいずれでも良い。常圧焼結法では、混合原
料粉末を金型プレス、CIP等のコールドプレス法で成形
後、真空中又はアルゴン、ヘリウム、一酸化炭素などの
非酸化性雰囲気下、温度1,400〜2,200℃好ましくは1,60
0〜2,000℃で30分〜６時間程度焼成する。ホットプレス
法も同様の条件下で100〜300kg/cm2程度の加圧を行う。
HIP法では、アルゴン、窒素などの不活性ガスを用い、
温度と時間については常圧焼結法と同程度とし圧力を10
0〜3,000kg/cm2程度にして焼結する。The sintering condition may be any one of the atmospheric pressure sintering method, the hot pressing method, and the HIP (hot isostatic pressure) method. In the pressureless sintering method, the mixed raw material powder is molded by a cold pressing method such as a die press and CIP, and then in vacuum or under a non-oxidizing atmosphere such as argon, helium, and carbon monoxide, at a temperature of 1,400 to 2,200 ° C. 1,60
Bake at 0 to 2,000 ° C for about 30 minutes to 6 hours. The hot press method also applies pressure of about 100 to 300 kg / cm 2 under the same conditions.
In the HIP method, an inert gas such as argon or nitrogen is used,
The temperature and time are the same as those of the atmospheric pressure sintering method, and the pressure is 10
Sinter at 0 to 3,000 kg / cm 2 .
〔作用〕 本発明の高耐食性焼結体を製造するのに用いられるZrB2
とCr3C2はいずれも耐食性に優れた性能を有することが
知られている。ZrB2はそれ自身はきわめて難焼結である
ため種々の焼結助剤が用いられているがZrB2本来の特性
を充分に発揮させ得ない。またCr3C2は単味ではかなり
焼結性が高まるが脆い硬化体しか得られず実用化にはほ
ど遠いものであった。[Operation] ZrB 2 used for producing the highly corrosion resistant sintered body of the present invention
Both Cr 3 C 2 and Cr 3 C 2 are known to have excellent corrosion resistance. Since ZrB 2 itself is extremely difficult to sinter, various sintering aids have been used, but the characteristics inherent to ZrB 2 cannot be fully exhibited. Further, Cr 3 C 2 alone has considerably improved sinterability, but only a brittle hardened material was obtained, which was far from practical use.
本発明は、これらのZrB2とCr3C2を組み合せることによ
り上記の欠点を補い得ること、すなわち、ZrB2とCr3C2
は相互に焼結助剤として機能することを見い出したもの
である。The present invention can supplement the above drawbacks by combining these ZrB 2 and Cr 3 C 2 , namely, ZrB 2 and Cr 3 C 2
Are mutually found to function as sintering aids.
本発明の高耐食性焼結体を製造する際に用いられる混合
原料粉末は、上記したZrB2とCr3C2の混合物以外に、BN,
AlN,B４C,SiC及びTiCから選ばれた少なくとも１種をそ
れらの合計量として50重量％以下をさらに含ませること
ができる。BNは、耐熱衝撃性の改善に用いるものであ
り、その混合原料粉末中の含有量は強度面から40重量％
以下である。AlNとTiCは硬化度改善剤として機能するも
のであり、その混合原料粉末中の含有量は、AlNは25重
量％以下、TiCは15重量％以下である。SiCは、耐酸化性
改善のために15重量％以下を混合原料粉末中に含ませ
る。また、B4Cは、硬化度改善のために使用するもので
あり、その混合原料粉末中の含有量は、強度、焼結密度
の点から25重量％以下である。なお、以上の第３成分の
合計量としての含有割合は50重量％以下であり、それ以
上であると本来のZrB2‐Cr3C2系焼結体の性質が損われ
る。The mixed raw material powder used in the production of the highly corrosion-resistant sintered body of the present invention is BN, in addition to the above-mentioned mixture of ZrB 2 and Cr 3 C 2 .
It is possible to further include at least one selected from AlN, B 4 C, SiC and TiC in a total amount of 50% by weight or less. BN is used for improving thermal shock resistance, and its content in the mixed raw material powder is 40% by weight from the viewpoint of strength.
It is the following. AlN and TiC function as a hardening degree improver, and the content of AlN and TiC in the mixed raw material powder is 25% by weight or less for AlN and 15% by weight or less for TiC. 15 wt% or less of SiC is included in the mixed raw material powder to improve oxidation resistance. B 4 C is used for improving the degree of curing, and its content in the mixed raw material powder is 25% by weight or less in terms of strength and sintered density. The content ratio of the above third component as a total amount is 50% by weight or less, and if it is more than 50% by weight, the original properties of the ZrB 2 -Cr 3 C 2 system sintered body are impaired.
本発明の高耐食性焼結体を製造するには、上記した混合
原料粉末にさらにAl2O3，SiO2,MgO,SiC,B4C，Si3N4等の
ウイスカー及びファイバーを混入することも可能であ
り、それによって耐衝撃性、耐熱衝撃性、破壊靱性等の
物性をさらに向上させることができる。In order to produce the highly corrosion-resistant sintered body of the present invention, whiskers and fibers such as Al 2 O 3 , SiO 2 , MgO, SiC, B 4 C and Si 3 N 4 should be further mixed in the above-mentioned mixed raw material powder. It is also possible to further improve physical properties such as impact resistance, thermal shock resistance and fracture toughness.
実施例１ 純度99％以上のZrB2粉末（平均粒径3.33μｍ）とCr3C2
粉末（平均粒径4.74μｍ）をボールミルで混合したもの
をCIP（2.7ton/cm2、３分間）成型し、真空雰囲気下(10
-1mmHg)において所定の温度、時間で焼成した。得られ
た焼結体の以下の測定法による物性を表−１に示す。Example 1 ZrB 2 powder having a purity of 99% or more (average particle size 3.33 μm) and Cr 3 C 2
Powder (average particle size 4.74 μm) mixed with a ball mill was molded into CIP (2.7 ton / cm 2 , 3 minutes), and then vacuumed (10
-1 mmHg) at a predetermined temperature for a predetermined time. Table 1 shows the physical properties of the obtained sintered body according to the following measuring methods.
（１）耐熱衝撃性は、急冷強度測定法で求めた。供試体
は３×４×40mmの曲げ強度試験片を用い、電気炉内で所
定温度まで加熱し、一定時間（１時間）保持後、炉の下
に設置してある０℃の水中へ降下させて試験片を急冷し
た。その試験片の曲げ強度を測定し強度が低下したとき
の加熱温度と水の温度（０℃）との差を△Ｔとした。(1) Thermal shock resistance was determined by a quenching strength measurement method. Bending strength test pieces of 3 x 4 x 40 mm were used as test specimens, heated to a prescribed temperature in an electric furnace, held for a certain time (1 hour), and then lowered into water at 0 ° C installed under the furnace. The test piece was quenched. The bending strength of the test piece was measured, and the difference between the heating temperature and the water temperature (0 ° C.) when the strength decreased was ΔT.
（２）耐食性は、３×４×40mmの試験片を1600℃、１時
間Ar雰囲気下でSS-41鋼の溶湯中に浸漬し、その侵食率
（％）を（侵食された容積／試験片の容積）×100に従
って算出し、その侵食率に応じて以下の３段階で評価し
た。(2) Corrosion resistance was determined by immersing a 3 × 4 × 40 mm test piece in molten SS-41 steel in an Ar atmosphere at 1600 ° C. for 1 hour, and measuring the erosion rate (%) (corroded volume / test piece Volume) × 100 and evaluated according to the erosion rate according to the following three grades.
○…侵食なし（侵食率０％） △…やや侵食（侵食率10％未満） ×…かなり侵食（侵食率10％以上） （３）耐酸化性は、大気中、1200℃で100時間熱処理し
た際の酸化増量（mg/cm2）を測定し、その程度に応じて
以下の４段階で評価した。○: No erosion (erosion rate 0%) △: Slight erosion (erosion rate less than 10%) ×: Significant erosion (erosion rate 10% or more) The increase in oxidation (mg / cm 2 ) at that time was measured, and the following four grades were evaluated according to the degree.
◎…酸化増量1mg/cm2未満 ○…酸化増量1mg/cm2以上5mg/cm2未満 △…酸化増量5mg/cm2以上20mg/cm2未満 ×…酸化増量20mg/cm2以上 （４）硬度（Hv）は、ビッカース硬度である。◎… Oxidation increase of less than 1 mg / cm 2 ○… Oxidation increase of 1 mg / cm 2 or more and less than 5 mg / cm 2 △… Oxidation increase of 5 mg / cm 2 or more and less than 20 mg / cm 2 ×… Oxidation increase of 20 mg / cm 2 or more (4) Hardness (Hv) is Vickers hardness.
表−１から明らかなように、ZrB2単味では焼結性は悪く
強度も低い。一方、Cr3C2が50重量％を越えると焼結密
度は高いが強度は低い。これに対し、ZrB299.5〜50重量
％と、Cr3C20.5〜50重量％の割合からなる混合原料粉末
を用いると、焼結密度、強度も高く耐熱衝撃性、耐食性
に優れた焼結体が得られる。ZrB2が多い程焼結温度は高
く、逆にCr3C2が多い組成では低い温度で焼成した方が
良い傾向を示す。 As is clear from Table 1, ZrB 2 alone has poor sinterability and low strength. On the other hand, when Cr 3 C 2 exceeds 50% by weight, the sintered density is high but the strength is low. On the other hand, when a mixed raw material powder consisting of ZrB 2 99.5 to 50% by weight and Cr 3 C 2 0.5 to 50% by weight is used, the sintering density, strength, thermal shock resistance and corrosion resistance are excellent. The body is obtained. The more ZrB 2 is contained, the higher the sintering temperature is. On the contrary, in the case of a composition containing a large amount of Cr 3 C 2 , it tends to be better to fire at a lower temperature.
実施例２ 実施例１と同様にZrB2、Cr3C2粉末及び純度99％以上のB
N,AlN,B４C,SiC,TiC粉末をボールミル混合したものをCI
P（2.7ton/cm2、３分間）成型後、温度1900℃の真空中
で180分間常圧焼結した。その物性を表−２に示す。な
お、BN,AlN,B４C,SiC,TiCの第３成分の添加量はZrB29
0、Cr3C210の重量比からなる組成物に対する内割の重量
％で示してある。また、BN,AlN,B4C,SiC,TiCの平均粒径
は５〜10μｍである。Example 2 ZrB 2 , Cr 3 C 2 powder and B having a purity of 99% or more as in Example 1.
A ball-milled mixture of N, AlN, B 4 C, SiC, TiC powders is used for CI
After P (2.7 ton / cm 2 , 3 minutes) molding, pressureless sintering was performed in a vacuum at a temperature of 1900 ° C. for 180 minutes. The physical properties are shown in Table 2. The addition amount of the third component of BN, AlN, B 4 C, SiC, TiC is ZrB 2 9
0, Cr 3 are shown by weight% of the inner split for C 2 10 composition comprising a weight ratio of. Also, BN, AlN, B 4 C , SiC, average particle size of the TiC is 5 to 10 [mu] m.
表−２から、BNの添加により耐熱衝撃性は著しく向上す
る、B4Cの添加により硬度の向上が顕著になる、AlN,Si
C,又はTiCを加えると焼結密度又は硬度が改善される、
ことがわかる。From Table-2, the thermal shock resistance is remarkably improved by the addition of BN, and the hardness is remarkably improved by the addition of B 4 C.
Adding C or TiC improves the sintered density or hardness,
I understand.
〔発明の効果〕 本発明の高耐食性焼結体は、強度、硬度、耐食性、耐酸
化性、耐熱衝撃性等に優れたものであるため、例えば、
アモルファス合金製造用急冷凝固法治具（ノズル、堰
材）、金属加工用押出ダイス、金属あるいはガラス溶解
用治具（ルツボ、型材）、ガスアーク溶接機用等高温下
で使用される電極、鉄鋼関連の保護管、レベルセンサー
などの用途が考えられる。 [Effect of the invention] The high corrosion resistance sintered body of the present invention is excellent in strength, hardness, corrosion resistance, oxidation resistance, thermal shock resistance, etc.
Rapid solidification jig for producing amorphous alloy (nozzle, weir material), extrusion die for metal processing, jig for melting metal or glass (crucible, mold material), electrode used at high temperature for gas arc welding machine, steel related Possible applications include protection tubes and level sensors.
Claims (2)
比がZrB2：Cr3C2＝99.5〜50:0.5〜50で合計100であるも
のを含有してなる混合原料粉末を焼結して得られたもの
であって、本質的にSi-Al-O-N相を有しないものである
ことを特徴とする高耐食性焼結体。1. A mixed raw material essentially consisting of ZrB 2 and Cr 3 C 2 , and having a weight ratio of ZrB 2 : Cr 3 C 2 = 99.5 to 50: 0.5 to 50 and a total of 100. What is claimed is: 1. A highly corrosion-resistant sintered body, which is obtained by sintering a powder and essentially does not have a Si-Al-ON phase.
から選ばれた少なくとも１種をそれらの合計で50重量％
以下をさらに含有してなり、しかも、BNについては40重
量％以下、AlNとB4Cについては各々25重量％以下、SiC
とTiCについては各々15重量％以下であることを特徴と
する請求項１記載の高耐食性焼結体。2. The mixed raw material powder is BN, AIN, B 4 C, SiC and TiC.
50% by weight in total of at least one selected from
It further contains: 40% by weight or less for BN, 25% by weight or less for each of AlN and B 4 C, SiC
The high corrosion resistance sintered body according to claim 1, wherein the content of TiC and the content of TiC are each 15% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63249786A JPH0672059B2 (en) | 1987-10-06 | 1988-10-05 | High corrosion resistance sintered body |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25072887 | 1987-10-06 | ||
| JP62-250728 | 1987-10-06 | ||
| JP63249786A JPH0672059B2 (en) | 1987-10-06 | 1988-10-05 | High corrosion resistance sintered body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01201078A JPH01201078A (en) | 1989-08-14 |
| JPH0672059B2 true JPH0672059B2 (en) | 1994-09-14 |
Family
ID=26539488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63249786A Expired - Lifetime JPH0672059B2 (en) | 1987-10-06 | 1988-10-05 | High corrosion resistance sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672059B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461407B (en) * | 2021-09-02 | 2022-01-07 | 北京利尔高温材料股份有限公司 | A kind of low-carbon magnesia-carbon brick with anti-oxidation performance and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742168B2 (en) * | 1987-04-10 | 1995-05-10 | 旭硝子株式会社 | Composite ceramics sintered body |
-
1988
- 1988-10-05 JP JP63249786A patent/JPH0672059B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01201078A (en) | 1989-08-14 |
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