Nb-Ti-Si三元系1173K等温截面的测定  

Determination of Isothermal Section of Ni-Ti-Si Ternary System at 1 173 K

作　　者：王日初[1] 阙基容 柳春雷[1] 金展鹏[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]西南铝业集团责任有限公司锻造厂,重庆401326

出　　处：《稀有金属与硬质合金》2002年第3期8-10,7,共4页Rare Metals and Cemented Carbides

摘　　要：运用扩散偶技术并结合电子探针微区成分分析方法 ,对Ni-Ti-Si三元扩散偶进行了相分析 ,测得了Ni-Ti-Si三元系 1173K下所生成的 7个扩散层 ,即TiSi2 、TiSi、Ti5Si4、Ti5Si3 、Ti3 Si、Nb5Si3 和NbSi2 ;未发现三元化合物。根据实验所得的结线数据并结合扩散偶中的相区分布规则 ,得出了Nb -Ti-Si三元系 1173K下的等温截面。The phase equilibria in the Ni-Ti-Si ternary system at 1 173 K was investigated by using diffusion triple technique and electron microprobe analysis (EMPA).The experimental results indicate that seven diffusion layers, which are TiSi 2, TiSi, Ti 5Si 4, Ti 5Si 3, Ti 3Si, Nb 5Si 3 and NbSi 2,exist in the Ni-Ti-Si ternary system at 1 173 K,and no ternary compound was observed in the diffusion triple.A tentative isothermal section of this system at 1 173 K was constructed based on the experimental data.The isothermal section consists of six three-phase regions.

关 键 词：扩散偶 Nb-Ti-Si三元系 结线 相平衡 等温截面 铌合金 高温合金 

分 类 号：TG146.416[一般工业技术—材料科学与工程]