摘要
对加入0．05mass％～0．5mass％稀土Y铸造的K38G高温合金800℃恒温的氧化行为进行了研究．结果表明，含Y铸态K38G合金的氧化动力学曲线偏离了抛物线规律，接近于立方规律；Y有效抑制了该合金的内氧化；当Y含量达0．5mass％时，该合金中析出富Y相，降低了其氧化抗力．
The addition of reactive elements can have a significant effect on the oxidation behavior of alumina- and chromia-forming alloys. The present work investigates the influence of Y contents on the isothermal oxidation behavior of cast K38G superalloy at 800℃ in air. The mass change data showed that the oxidation kinetics of cast alloys with Y addition were deviated from traditional parabolic rate law, with a calculated exponential number close to 3. The addition of Y effectively prevented the cast alloys from internal oxidation. An Y-riched phase was precipitated in the cast alloy with 0.5 mass. % Y, which showed a negative effect on the oxidation resistance of cast alloys.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2006年第3期183-186,共4页
Corrosion Science and Protection Technology
