航空材料学报2013，Vol.33Issue(4)：1-8,8.DOI:10.3969/j.issn.1005-5053.2013.4.001
镍基合金空心叶片浇铸用硅基陶瓷型芯的制备及性能
Preparation of Silica Based Ceramic Core in Casting of Nickel-Based Alloy Hollow Blade
摘要
Abstract
The silica based ceramic cores were formed by hot pressure molding method.The composition,porosity,expansion coefficient,microstructure and mechanical property of the sintered ceramic cores were characterized.The test results show that the pores of the ceramic cores are distributed in multiple peaks,and mainly locate from 0.1μm to 5 μm.With the temperature increasing to 1400℃,the expansion coefficient is decreased and the downtrend is suddenly intensified between 1170℃ and 1350℃.The β-cristobalite phase and amorphous quartz coexist in the ceramic cores sintered at 1200℃.Heated at 1550℃ for 2h,the compactness of the ceramic cores increases,and the pore structure is more distinct,furthermore,both the quantity and the length of the cracks at the exterior and interior of the ceramic cores increase.Besides,the nickel-based alloy hollow blade was casted using the ceramic cores manufactured at the temperature of 1550℃ successfully.关键词
陶瓷型芯/单晶叶片/抗弯强度/高温蠕变Key words
ceramic cores/ single-crystal blade/ flexural strength/ high-temperature creep分类
通用工业技术引用本文复制引用
康海峰,李飞,赵彦杰,徐华苹,孙宝德..镍基合金空心叶片浇铸用硅基陶瓷型芯的制备及性能[J].航空材料学报,2013,33(4):1-8,8.基金项目
上海"科技创新行动计划"(08dj1400400) （08dj1400400）
