DZ445镍基高温合金高温长时间氧化形成的多层膜结构

刘来娣, 丁彪, 任维丽, 钟云波, 王晖, 王秋良

Multilayer Structure of DZ445 Ni-Based Superalloy Formed by Long Time Oxidation at High Temperature

LIU Laidi, DING Biao, REN Weili, ZHONG Yunbo, WANG Hui, WANG Qiuliang

表5 900℃下DZ445镍基高温合金元素氧化物生成的Gibbs自由能(ΔG)[17,21,23] (kJ·mol-1)

Table 5 Gibbs free energies (ΔG) of various oxides formation of DZ445 Ni-based superalloy at 900oC[17,21,23]

Oxide ΔG Oxide ΔG NiO -279.2 NiCr2O4 -826.2 Cr2O3 -547.1 CrTaO4 -580.3 TiO2 -733.4 CoO -274.9 Al2O3 -869.2 WO2 -379.7 Ta2O5 -613.5 MoO2 -382.9