摘要
针对等离子旋转电极工艺制备的FGH96合金粉末,采用俄歇电子能谱对合金粉末的颗粒表面进行成分分析,并利用透射电镜对预热处理后粉末中的碳化物演变进行研究。结果表明:FGH96合金粉末的颗粒表面明显存在O、C和Ti元素的偏聚,原始合金粉末的颗粒表面由O和C原子吸附层和富含Ti元素的碳氧化物层组成;经过预热处理,颗粒中形成于快速凝固过程中的MC′亚稳碳化物转变成稳定的MC碳化物,并析出M23C6碳化物,明显改善了颗粒内碳化物的稳定性和分布状态。
The chemical composition on particle surface of FGH96 superalloy powders was analyzed by means of auger electron spectroscopy （AES）, and the carbide evolution after pre-heat treatment was also analyzed by TEM. The results show that elements O, C and Ti segregate on the particle surface, which is composed of absorption layer and oxy-carbides layer. The absorption layer is mainly composed of O and C atoms, while the oxy-carbides layer is characterized as Ti oxide and carbide. MC＇ metastable carbide precipitates during the quick solidification, after the pre-heat treatment, the metastable carbide MC＇ changes to stable MC carbide and M23C6precipitates. This improves the stability and distribution state of carbide in the particles.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2012年第10期2797-2804,共8页
The Chinese Journal of Nonferrous Metals
基金
国家重点基础研究发展计划资助项目(2010CB631204)
关键词
FGH96合金粉末
俄歇分析
预热处理
碳化物
FGH96 superalloy powder
auger electron spectroscopy
pre-heat treatment
carbide
