硅酸盐学报2017，Vol.45Issue(9)：1354-1359,6.DOI:10.14062/j.issn.0454-5648.2017.09.19
掺杂CaO对BaZrO3坩埚制备及其与钛合金界面反应的影响
Effect of CaO on Preparation of BaZrO3 Crucible and Its Interfacial Reaction to Titanium Alloy
摘要
Abstract
CaO-doped BaZrO3 and BaZrO3 powders were synthesized by a solid-state method at 1400 ℃ with BaCO3, ZrO2 and CaO powder as starting materials, and subsequently titanium alloys were melted in two crucibles that were prepared with the synthesized powders by cold isostatic pressing and solid-state sintering at 1750 ℃, respectively. The effect of CaO additive on the microstructure evolution of BaZrO3 crucible and the interfacial reaction with titanium alloys was investigated. The results show that a part of CaO salutes into BaZrO3, and the excessive CaO gathers together in sintering process, hindering the sintering of Ba1-xCaxZrO3 grains and resulting in massive big pores in the crucible. A precipitation behavior of CaO in the crucible wall occurs, and this precipitation layer is mainly composed of CaO and Ba1-xCaxZrO3 with the thickness of approximately 70 μm. The erosion thickness of BaZrO3 crucible is 270 μm, and little interfacial reaction between titanium alloys and CaO-doped BaZrO3 crucible occurs.关键词
锆酸钡/氧化钙/掺杂/钛合金/界面反应Key words
barium zirconate/calcite/doping/titanium alloy/interfacial reaction分类
化学工程引用本文复制引用
陈光耀,李宝同,高鹏越,ALIWajid,秦子威,鲁雄刚,李重河..掺杂CaO对BaZrO3坩埚制备及其与钛合金界面反应的影响[J].硅酸盐学报,2017,45(9):1354-1359,6.基金项目
国家自然科学基金(51374142) （51374142）
国家"973"计划(2014CB643403) （2014CB643403）
上海市科委基金(14JC1491400)资助. （14JC1491400）
