ZrB_2基超高温陶瓷材料的抗热震性能  

Thermal Shock Property of ZrB_2-Based Ultra-High Temperature Ceramics

作　　者：屈强[1] 蔡正谊[1] 韩文波[2] 

机构地区：[1]中国运载火箭技术研究院研发中心,北京100076 [2]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《宇航材料工艺》2010年第2期28-32,36,共6页Aerospace Materials & Technology

摘　　要：通过水淬法对原位合成与热压烧结制备的组分为ZrB2-20%(体积分数,下同)SiC-6.05%ZrC陶瓷材料的热震性能进行了研究。对比了不同热震温差、室温水(25℃)与沸水冷却环境、单次与五次循环热震次数以及高温氧化对原位合成试样抗热震性能的影响。计算了原位合成与热压烧结两种工艺制备的同组分试样的抗热震参数,结合试验结果探讨了材料的抗热震机理。结果表明,原位合成试样的抗热震性能优于热压烧结试样。The thermal shock behavior of ZrB2-20%SiC-6.05%ZrC composites fabricated with in-situ method and hot-pressing was studied by means of quenching into water from high temperatures. The effects of thermal shock temperature differences,cool （25℃ of bath temperature） and boiling water as cooling medium,single and five cyclic shocks and high temperature oxidation on thermal shock resistance of samples fabricated through in-situ method were investigated. The thermal shock resistance parameters of samples fabricated through in-situ method and hot pressing were compared and then the mechanism of thermal shock resistance was also discussed. The results show that thermal shock property of in-situ sample was better than that of hot-pressing sample.

关 键 词：抗热震性能 ZRB2 裂纹 残余强度 

分 类 号：TQ174.758.1[化学工程—陶瓷工业]