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材料工程  2016, Vol. 44 Issue (3): 9-14    DOI: 10.11868/j.issn.1001-4381.2016.03.002
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
SiO2-ZrO2陶瓷型芯与DZ125,DD5和DD6三种铸造高温合金的界面反应
王丽丽, 李嘉荣, 唐定中, 刘世忠
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
Interfacial Reactions Between SiO2-ZrO2 Ceramic Core and DZ125,DD5,DD6 Casting Superalloys
WANG Li-li, LI Jia-rong, TANG Ding-zhong, LIU Shi-zhong
Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 采用热压注工艺制备以钙稳定氧化锆为矿化剂的SiO2-ZrO2陶瓷型芯试板,继而通过定向凝固分别在1510℃和1530℃制备SiO2-ZrO2型芯与DZ125,DD5和DD6三种高温合金的界面反应空心试板,将空心试板于相同高度处横向剖开,对获得的合金/型芯界面反应试样的微观形貌进行SEM和EDS分析。结果表明,SiO2-ZrO2陶瓷型芯在1500℃以上的高温化学稳定性差,与DZ125,DD5和DD6合金均发生不同程度的界面化学反应,反应产物类型与合金成分密切相关。对于Hf含量较高的DZ125合金来说,合金中Hf与SiO2-ZrO2型芯中的SiO2反应生成HfO2,并在合金表面富集,阻止了合金中Al与型芯的反应。对于Hf含量较低的DD5,DD6合金来说,合金与SiO2-ZrO2型芯界面反应的产物是Al2O3,其由合金中Al与SiO2反应生成,而矿化剂钙稳定氧化锆对这一界面反应有促进作用。
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王丽丽
李嘉荣
唐定中
刘世忠
关键词 SiO2-ZrO2陶瓷型芯DZ125DD5DD6界面反应钙稳定氧化锆    
Abstract:SiO2-ZrO2 based ceramic core plates with calcium stabled zirconia were fabricated by ceramic injection moulding. The hollow interfacial reaction plates of DZ125,DD5 and DD6 superalloys were fabricated by directional solidification at 1510℃and 1530℃ using SiO2-ZrO2 based ceramic cores, and the interfacial samples were obtained by horizontally cutting these hollow plates. The microstructure analysis of the interfacial samples shows that the high temperature chemical stability of SiO2-ZrO2 based ceramic core above 1500℃ is poor, due to different chemical reactions with DZ125, DD5 and DD6, and the reaction products are closely related to the compositions of superalloys. For DZ125 superalloy with higher Hf content,the reaction product is HfO2,which is rich on the interface and protects Al in DZ125 superalloy from oxidation. For DD5 and DD6 superalloys with lower Hf,Al2O3 is the reaction product between superalloys and ceramic cores and comes from the reaction between Al in superalloys and SiO2 in ceramic cores,which is accelerated by calcium stabled zirconia.
Key wordsSiO2-ZrO2 based ceramic core    DZ125    DD5    DD6    interfacial reaction    calcium stabled zirconia
收稿日期: 2014-07-14      出版日期: 2016-03-22
中图分类号:  TG146.1+5  
通讯作者: 王丽丽(1983-),女,博士,工程师,主要从事陶瓷型芯材料与技术方面的研究工作,联系地址:北京市81信箱1分箱(100095),E-mail:wanglili201301@sina.cn     E-mail: wanglili201301@sina.cn
引用本文:   
王丽丽, 李嘉荣, 唐定中, 刘世忠. SiO2-ZrO2陶瓷型芯与DZ125,DD5和DD6三种铸造高温合金的界面反应[J]. 材料工程, 2016, 44(3): 9-14.
WANG Li-li, LI Jia-rong, TANG Ding-zhong, LIU Shi-zhong. Interfacial Reactions Between SiO2-ZrO2 Ceramic Core and DZ125,DD5,DD6 Casting Superalloys. Journal of Materials Engineering, 2016, 44(3): 9-14.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.03.002      或      http://jme.biam.ac.cn/CN/Y2016/V44/I3/9
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