著者

加藤 清隆 野崎 佳彦

出版者

公益社団法人 日本鋳造工学会

雑誌

鋳物 (ISSN:00214396)

巻号頁・発行日

vol.62, no.9, pp.726-731, 1990-09-25 (Released:2011-07-27)

参考文献数

9

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The basic research of ceramic core was carried out on the core which could be used solidification controled castings of Ni-base superalloy such as single crystal casting.  Fused silica was selected as a main material of core because of high leachability to aqueous alkaki solution, and the test piece of core was producted by press molding process.  When the burning temperature is 1300∼1320°C, this ceramic core shows very low thermal expansion ratio (0.1%) and the highest deflective strength at room temperature (about 20°C : 400 kgf/cm2). With the addition of 10∼20wt% cristobalite to fused silica, it restrains softening of the core at high temperature and shrinkage of the core after reburning.   Furthermore the influence of the grain size change of fused silica on the properties of the core was also investigated.