Synthesis of MoSi2-TiSi2 pseudobinary alloys by reactive sintering

被引:0
|
作者
Kiyotaka Matsuura
Tatsuya Ohmi
Masayuki Kudoh
Tohru Hasegawa
机构
[1] Hokkaido University,the Division of Materials Science and Engineering, Graduate School of Engineering
[2] Kawasaki Heavy Industries,undefined
[3] Ltd.,undefined
来源
Metallurgical and Materials Transactions A | 2000年 / 31卷
关键词
Material Transaction; Oxide Scale; Oxidation Resistance; Vickers Hardness; Titanium Content;
D O I
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中图分类号
学科分类号
摘要
MoSi2-TiSi2 pseudobinary alloys are synthesized from mixtures of elemental powders of molybdenum, silicon, and titanium by reactive sintering under a pseudoisostatic pressure of 150 MPa. When the titanium content in the alloy increases from 0 to 33 at. pct, the density of the alloy decreases from approximately 6 to 4 g/cm3, while the relative density is more than 95 pct independent of the titanium content. Vickers hardness of the alloy is approximately 800 when the alloy consists of a monophase structure of α-MoSi2 or β-MoSi2. However, the hardness increases to approximately 950 when the alloy consists of a dual-phase structure of (α-MoSi2+β-MoSi2) or (β-MoSi2+γ-TiSi2). The oxidation resistance of the alloy at 773 K is approximately tripled when the titanium content increases from 0 to 1.7 at. pct, but the effect of the titanium content on the oxidation resistance becomes less remarkable as the titanium content increases.
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页码:747 / 753
页数:6
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