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铸造镍基高温合金K35的氧化动力学 被引量：24

The Oxidation Kinetics of Cast Ni-Base Superalloy K35
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摘要 用静态增重法研究了K35镍基铸造高温合金的800℃氧化动力学·结果表明,K35合金的氧化动力学遵循抛物线规律,属于完全抗氧化级·利用X射线衍射、扫描电镜和能谱分析确定K35合金氧化膜组成以Cr2O3为主,含有NiCr2O4及TiO·TiO2·由于钛氧化物的存在,在高温氧化期间,K35合金发生了内氧化· The oxidation kinetics and the oxidation layer of a cast Nibase superalloy K35 at 800?℃ were studied by still TGA method. The results show that oxidation kinetics of the superalloy K35 obeys the parabolic law. The oxidation stage can be divided into two parts within 100?h:the oxidation rate are 250×10-7?mg2/cm4·s in first stage and 205?×10-7?mg2/cm4·s in the other stage. Because the average oxidation velocity is 000263?mg/cm2·h for 100?h, the oxidation resistance of the superalloy K35 is the first grade. It is suggested that oxidation rate of the superalloy K35 is dependent on the growth dynamics of Cr2O3. The oxide layer was examided by Xray diffraction, scanning electron microscopy (SEM) and energy spectrum analysis (ESA). The layer is thin and consists of Cr2O3 mainly with a bit of NiCr2O4 and TiO·TiO2. During oxidation at 800?℃,the inner oxidation occures in the superalloy.
作者 李云 袁超 郭建亭 杨洪才
机构地区 东北大学材料与冶金学院 中国科学院金属研究所
出处 《东北大学学报（自然科学版）》 EI CAS CSCD 北大核心 2003年第1期75-78,共4页 Journal of Northeastern University(Natural Science)
基金 国家自然科学基金资助项目(59895152).
关键词 镍基高温合金 高温氧化 氧化动力学 静态增重法 抗氧化级 内氧化 K35合金 燃气轮机 superalloy high temperature oxidation oxidation kinetics still TGA method grade of oxidation resistance inner oxidation behavior
分类号 TG132.32 [一般工业技术—材料科学与工程] TK475 [动力工程及工程热物理—动力机械及工程]
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参考文献9

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二级参考文献19

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共引文献18

同被引文献205

引证文献24

二级引证文献134

东北大学学报（自然科学版）
2003年 第1期

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