Phase equilibria of the Nb-Si-W ternary system at 1873 K
The phase equilibria of the Nb-Si-W ternary system have been studied for the Si-rich portion by investigating the as-cast+heat-treated ternary alloys.The microstructure observation,the phase identification and the composition measurement were performed using scanning electron microscopy (SEM),X-ray diffraction (XRD) and electron probe microanalysis (EPMA),respectively.Partial isothermal section of the Nb-Si-W ternary system with 0.4 < x(Si)< 1 at 1873K has been constructed.No ternary compound was found at this isothermal section.There are two three-phase regions,Diamond-Si+Nb(W)Si2+W(Nb)Si2 and Nb(W)Si2+W(Nb)Si2+β(Nb,W)5Si3,two two-phase regions,Diamond-Si+Nb(W)Si2 and Nb(W)Si2+β(Nb,W)5Si3.
Nb-Si-W ternary system Microstructure Isothermal section Phase equilibrium
李燕 李长荣 杜振民 郭翠萍
北京科技大学材料科学与工程学院
国内会议
常州
英文
327-329
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）