强化处理对Al_2O_3/SiO_2陶瓷型芯高温变形的影响  

Influence of Strengthening Treatment on the Deformation of Al_2O_3/SiO_2 Nano-compound Ceramic Core at High Temperature

作　　者：赵红亮[1] 翁康荣[1] 关绍康[1] 楼琅洪[2] 李英敖[2] 赵惠田[2] 胡壮麒[2] 

机构地区：[1]郑州大学 [2]中国科学院金属研究所

出　　处：《特种铸造及有色合金》2003年第5期7-8,共2页Special Casting & Nonferrous Alloys

基　　金：中国博士后科学基金资助项目;中国科学院知识创新工程项目 (KGCX2 - 2 1 2 - 0 3)

摘　　要：研究了强化处理对Al2 O3 /SiO2 纳米复合陶瓷型芯高温变形的影响规律 ,结果表明 :强化处理对Al2 O3 /SiO2 纳米复合陶瓷型芯高温变形的影响很大 ,15 5 0℃保温 1h的高温挠度由强化前的 7mm降至强化后的 1mm。强化剂的浓度对陶瓷型芯高温变形的影响不明显 ,强化次数对陶瓷型芯高温变形的影响相对较大。强化后的陶瓷型芯中出现了莫来石新生片状晶 ,减少了型芯的高温变形。Influence of strengthening treatment on the deformation of Al 2O 3/SiO 2 nano-compound ceramic core at high temperature was examined. The results showed that the strengthening treatment has great effect on the deformation of Al 2O 3/SiO 2 nano-compound ceramic core at high temperature. The deflection of the ceramic core at 1 550 ℃ for 1 h dropped from 7 mm to 1 mm before and after being strengthened. Concentration of the strengthening agent has a little effect on the deformation of the ceramic core while the strengthening times has relatively great effect.Lamellar mullite crystal microstructure appeared in the fracture surface of strengthened ceramic core, resulting in the core deformation decrease at high temperature.

关 键 词：强化 纳米复合陶瓷型芯 高温变形 高温挠度 

分 类 号：TG242.7[金属学及工艺—铸造]