镍基高温合金定向凝固用陶瓷型壳粘砂反应

石振威, 郑伟, 卢玉章, 张功, 申健

Sand-burning Reaction of Ceramic Shell for Directional Solidification of Nickel-based Superalloy

SHI Zhenwei, ZHENG Wei, LU Yuzhang, ZHANG Gong, SHEN Jian

表7 相关界面反应的吉布斯自由能

Table 7 Gibbs free energy of related interfacial reaction

Reactions △Gf at 1800 K/kJ·mol-1 2Al+Cr2O3→Al2O3+2Cr -221.7 4Al+3SiO2→ 2Al2O3+3Si -105.3 Ti+SiO2→ TiO2+Si -47.6