摘要
利用差热分析和ＸＲＤ分析确定了Ｔｉ与Ｂ４Ｃ发生化学反应的温度和１６００℃保温０．５ｈ后的物相组成，通过Ｔｉ－Ｂ４Ｃ扩散偶对反应机理进行了研究，实验结果表明在反应过程中扩散路径是：Ｔｉ／ＴｉＣ／ＴｉＢ／ＴｉＢ２／Ｂ４Ｃ，在扩散偶中Ｔｉ与Ｂ４Ｃ作为反应相始终存在，生成物中 ＴｉＢ２， ＴｉＢ和 ＴｉＣ三相同时存在，而对于粉料烧结后只有 ＴｉＢ２和ＴｉＣ两相．
The beginning temperature of chemical reaction between Ti and B4C and the production phase after soaking 0.5h at 1600℃ were determined by DT and XRD, respectively. The mechanism of chemical reaction was studied by the diffusion couples of Ti-B4C. It shows that the diffusion path is Ti/TiC/TiB/TiB2/B4C and the (TiB2+TiC+TiB) triple phases coexist in the Ti-B4C diffusion couples. However, there exist two phases of TiB2 and TiC for the powders of Ti+B4C sintered at 1600℃.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第5期884-888,共5页
Journal of Inorganic Materials
