Synthesis of MoSi2-TiSi2 pseudobinary alloys by reactive sintering
Synthesis of MoSi2-TiSi2 pseudobinary alloys by reactive sintering
复制标题
反应烧结合成MoSi2-TiSi2准二元合金
DOI：
10.1007/s11661-000-0016-3
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Tohru Hasegawa
中科院分区：
文献类型：
--
作者：
K. Matsuura;T. Ohmi;M. Kudoh;Tohru Hasegawa
mosi2 - tisi2伪二元合金是在150 MPa的假等静压下，由钼、硅和钛元素粉末的混合物进行反应烧结合成的。当合金中钛含量从0增加到33 at时。随着钛含量的增加，合金密度从约6 g/cm3下降到4 g/cm3，而相对密度大于95 Pct。当合金为α- mosi2或β- mosi2单相组织时，合金的维氏硬度约为800。然而，当合金由（α-MoSi2+β-MoSi2）或（β-MoSi2+γ-TiSi2）双相结构组成时，硬度增加到950左右。当钛含量从0增加到1.7 at时，合金在773 K时的抗氧化性能提高了近三倍。随着钛含量的增加，钛含量对抗氧化性能的影响逐渐减弱。
MoSi2-TiSi2pseudobinary 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 ofα-MoSi2orβ-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.