摘要
以果糖为碳源开展内凝胶结合碳热还原反应制备ZrCO复合陶瓷微球的工艺研究,着重研究了烧结气氛和烧结温度对ZrCO复合陶瓷微球的成分、表面形貌、微观结构和力学性能的影响。研究发现在氩气中含有不同CO含量的混合气氛及1550℃烧结获得的ZrCO陶瓷微球表面非常光滑,且球形度较好,但烧结气氛中CO混合气氛的加入抑制ZrO2的碳热还原反应的进程。升高烧结温度能够进一步让碳热还原反应进行,但获得的烧结微球的压碎强度则逐渐减小。
The fabrication process of ZrCO composite ceramic microspheres was studied through internal gelation combined with carbothermic reduction with fructose as carbon source.The effects of sintering atmosphere and sintering temperature on composition,surface morphology,microstructure and mechanical properties of the ZrCO composite ceramic microsphe res were systematically examined.It was found that the ZrCO ceramic microspheres sintered at 1550℃with argon containing different concentrations of CO had very smooth surface and high degree of sphericity,but the carbothermic reduction of ZrO2 was inhibited by the introduction of CO in the sintering atmosphere.Although the carbothermal reduction reaction could be furthe r promoted by increasing the sintering temperature,but the fractural strength of the sintered microspheres was gradually decr eased.
作者
孙玺
马景陶
邓长生
赵兴宇
郝少昌
刘兵
SUN Xi;MA Jingtao;DENG Changsheng;ZHAO Xingyu;HAO Shaochang;LIU Bing(Nuclear fuel and material research department,Central research institute of state power investment corporation,Beijing 102209,China;State Key Laboratory of New Ceramics and Fine Processing,Collaborative Innovation Center of Advanced Nuclear Energy Technology,Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)
出处
《陶瓷学报》
CAS
北大核心
2020年第1期58-64,共7页
Journal of Ceramics
基金
政府间国际科技创新合作重点专项(2016YFE0100700)
国家自然科学基金(51420105006)
清华大学“十三五”学科建设专项经费(2017HYYXKJS1)
国家新材料生产应用示范平台(核能材料)项目(A-ZY04-201801)。
关键词
ZrCO陶瓷微球
碳热还原
烧结气氛
烧结温度
ZrCO ceramic microspheres
carbothermic reduction
sintering atmosphere
sintering temperature
