DD6单晶高温合金与陶瓷型壳的界面反应  

Interface Reaction between DD6 Single Crystal Superalloy and Ceramic Mold

作　　者：姚建省[1] 唐定中[1] 刘晓光[1] 李鑫[1] 王丽丽[1] 曹春晓[1] 丁方政 陈昊 

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095 [2]空军驻北京地区军事代表室,北京100095

出　　处：《航空材料学报》2015年第6期1-7,共7页Journal of Aeronautical Materials

基　　金：国防基础科研项目(A0520133013);国家科技重大专项(2012ZX04007-021)

摘　　要：采用光学显微镜、扫描电子显微镜及能谱等分析手段研究了DD6单晶合金与陶瓷型壳的界面反应.结果表明：DD6高温合金与陶瓷型壳的界面反应产物主要是Al2O3和HfO2,同时伴随着少量Ta元素的析出;界面反应层的厚度为5～6μm,反应产物在合金/型壳界面的富集,能够抑制氧化反应的进一步进行;高温下DD6合金与陶瓷型壳润湿角为145 ～150°,降低型壳内表面的气孔率能够减少毛细作用的产生,从而有效抑制界面反应的产生.The interface reaction between DD6 single crystal superalloy and ceramic mold was investigated by optical microscope （OM）, scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS）. The results show that the reaction products are A1203 and HfO2 , and small amount of Ta was released at the same time. The thickness of the reaction layer is 5 - 6~m. As the re- action products are concentrated in the interface of alloy/mold, the oxidation reactions were inhibited. The contact angle between DD6 alloy and ceramic mold is 145 - 150~ at high temperature. The capillary action is decreased by reducing the porosity of the ceramic mold, and the interface reaction can be inhibited simultaneously.

关 键 词：DD6单晶合金 陶瓷型壳 界面反应 润湿 

分 类 号：TG132.32[一般工业技术—材料科学与工程]