1 100℃isothermal section of Nb-W-Zr-C quaternary system^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：夏长清 古一 李炜 曾凡浩

文章页码：215 - 217

Key words：Nb-W-Zr-C quaternary system; diffusion couple; isothermal section

Abstract: An isothermal section of the Nb-W-Zr-C system at 1 100℃was established by means of multiphase diffusion couples along with electron microprobe analysis and X-ray diffraction analysis. The isothermal section consists of two single-phase regions,α(Nb, W, Zr) and (W, Nb)₂Zr and one double-phase region,α(Nb, W, Zr)+(W, Nb)₂Zr. It is concluded that (W, Nb)₂Zr is an interstitial intermediate phase with the face-centered cubic (Cu₂Mg) lattices. The maxi- mum solid solubility of carbon in (W, Nb)₂Zr phase is determined as about 4.18%C(mole fraction).The composition ranges of tungsten in the (W, Nb)2Zr phase are 55.41% to 65.98% and the maximum solid solubility of niobium in (W, Nb)₂Zr is determined as 7.78%.