颗粒
材料科学
烧结
氩
坩埚(大地测量学)
冶金
杂质
微观结构
相(物质)
真空炉
原材料
手套箱
分析化学(期刊)
复合材料
计算化学
化学
原子物理学
有机化学
工程类
物理
机械工程
色谱法
作者
Rita E. Hoggan,Jason Harp,Lingfeng He
出处
期刊:Ceramic transactions
日期:2018-10-01
卷期号:: 21-26
标识
DOI:10.1002/9781119543299.ch3
摘要
This chapter examines the microstructure, phase composition, and related density measurements of pellets sintered in each environment. A batch of pellets fabricated by the process reported were prepared in an experiment for sintering with three pellets randomly sampled for sintering in each environment, namely Argon and Vacuum. Three sample pellets were used in each environment as that was the standard sintering batch size according to the size of the tantalum crucible used for all sintering. The argon samples were sintered in a high temperature CM box furnace inside an argon atmosphere glove box with an approximate O2 impurity content of up to 40 ppm. An iron rich phase was identified with arrows indicating its location in the sample. The iron is thought to be a contaminant in the original uranium feedstock. It is often observed as a small precipitate connected to an oxide precipitate. This iron phase is likely present in both argon and vacuum samples, but was observed only in the vacuum sample.
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