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掺杂CaO对BaZrO3坩埚制备及其与钛合金界面反应的影响
作者:陈光耀1 2 李宝同1 2 高鹏越1 2 ALI Wajid1 2 秦子威1 2 鲁雄刚1 2 3 李重河1 2 3 
单位:1. 上海大学材料科学与工程学院 省部共建高品质特殊钢冶金与制备国家重点实验室 上海 200072 2. 上海大学材料科学与工程学院 上海市钢铁冶金新技术开发应用重点实验室 上海 200072 3. 上海特种铸造工程技术研究中心 上海 201605 
关键词:锆酸钡 氧化钙 掺杂 钛合金 界面反应 
分类号:TQ17
出版年,卷(期):页码:2017,45(9):0-0
DOI:
摘要:

 用BaCO3、ZrO2和CaO混合粉料,在1 400 ℃经高温固相反应合成了BaZrO3和CaO掺杂BaZrO3粉料,采用冷等静压结合固相烧结技术,在1 750 ℃烧成BaZrO3和CaO掺杂BaZrO3坩埚,并熔炼Ti2Ni合金,研究了CaO对BaZrO3坩锅微观组织及其与钛合金界面反应的影响。结果表明:掺杂量为15%(摩尔分数)的CaO部分固溶进BaZrO3,坩埚在烧成过程中,过量CaO部分在坩埚内部团聚,阻碍Ba1–xCaxZrO3晶粒的生长,导致坩埚内部出现较大孔洞;另一部分在坩埚壁析出,析出层主要由CaO和Ba1–xCaxZrO3组成,厚度约为70 μm。BaZrO3坩埚与钛合金界面反应层厚度约为270 μm,而CaO掺杂BaZrO3坩埚与合金并无明显界面反应层。

 
基金项目:
国家自然科学基金(51374142);国家“973”计划(2014CB643403);上海市科委基金(14JC1491400)资助。
作者简介:
陈光耀(1987—),男,博士研究生。
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