摘要
制备了W-Ti[w(Ti)=10%]合金,研究了粉末纯度、W粉粒度对W-Ti[w(Ti)=10%]合金密度、组织的影响。发现粉末纯度越高,W-Ti[w(Ti)=10%]合金的致密度越高,富Ti相占比越低。3N纯度的W-Ti[w(Ti)=10%]合金内部会留存纯Ti,富Ti相占比为31.28%,4N和4N5纯度的W-Ti[w(Ti)=10%]合金不存在纯Ti,富Ti相占比分别为28.41%、21.67%。W粉粒度的影响体现在两个方面:W粉粒度越大,与Ti粉的混合效果越好,越有利于扩散;但比表面积越小,越不利于扩散。随着W粉粒度增大,W-Ti[w(Ti)=10%]合金的富Ti相含量先降低后升高。本实验中,当W粉粒度为4~5μm,Ti粉粒度为44μm时,W-Ti[w(Ti)=10%]合金的组织性能最优,富Ti相占比为28.79%。
W-Ti[w(Ti)=10%]alloy was prepared,and the influence of powder purity and W powder size on the density and microstructure of W-Ti[w(Ti)=10%]alloy was studied.It is found that the higher the purity of powder,the higher the density of W-Ti[w(Ti)=10%]alloy,and the lower the Ti rich phase proportion.The W-Ti[w(Ti)=10%]alloy with 3N purity will retain pure Ti,and the proportion of Ti-rich phase is 31.28%.The W-Ti[w(Ti)=10%]alloy with 4N and 4N5 purity does not have pure Ti,and the proportion of Ti-rich phase is 28.41%and 21.67%,respectively.The influence of W powder particle size is reflected in two aspects:the larger the W powder particle size,the better the mixing effect with Ti powder,the more conducive to diffusion;but the smaller the specific surface area,the less conducive to diffusion.With the increase of W particle size,the Ti-rich phase content of W-Ti[w(Ti)=10%]alloy decreases first and then increases.In this experiment,when the particle size of W powder is 4~5μm and the particle size of Ti powder is 44μm,the microstructure properties of W-Ti[w(Ti)=10%]alloy are the best,and the proportion of Ti-rich phase is 28.79%.
作者
杨亚飞
姚草根
吕宏军
谢飞
孟烁
YANG Yafei;YAO Caogen;LYU Hongjun;XIE Fei;MENG Shuo(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2024年第5期31-39,共9页
Aerospace Materials & Technology
