Ni-15Cr-5Al-xSi合金在1 000 ℃下的抗氧化性能
Oxidation Resistance at 1 000℃ of Ni-15Cr-5Al-xSi Alloys
摘 要
应用粉末冶金方法制备Ni-15Cr-5Al-xSi（x=0，1，3，5，质量分数/%）合金，并在1 000℃氧化100 h，研究了硅含量对合金表面物相组成和高温抗氧化性能的影响。结果表明：当硅质量分数为0，1%时，合金均为抗氧化级，当硅质量分数为3%，5%时为完全抗氧化级；氧化后4种合金表面均形成了NiO和Al2O3，当硅质量分数为0，1%时合金表面还存在NiAl2O4和Cr2O3，硅质量分数为3%时，合金表面还存在少量Cr2O3和NiCr2O4；当硅质量分数为5%时，合金表面氧化膜平坦、组织致密且氧化物颗粒细小均匀，合金具有最好的高温抗氧化性能。
抗氧化性
氧化动力学
氧化膜
Ni-based superalloy
oxidation resistance
oxidation kinetics
oxide scale
Abstract
Ni-15Cr-5Al-xSi (x=0, 1, 3, 5, mass fraction/%) alloys were prepared by powder metallurgy and then oxidized at 1 000℃ for 100 h. Effects of silicon content on surface phase composition and high temperature oxidation resistance of the alloys were studied. The results show that the alloys with 0 and 1wt% silicon were both anti-oxidant grade, and the alloys with 3wt% and 5wt% silicon were both complete anti-oxidant grade. After oxidation, NiO and Al2O3 oxides were formed on surface of all the four alloys; also, NiAl2O4 and Cr2O3 existed on surface of the alloys with silicon content of 0 and 1wt%, and a small amount of Cr2O3 and NiCr2O4 were found with silicon content of 3wt% and 5wt%. The oxide scale on surface of the alloy with 5wt% silicon was flat and had a dense structure, and the oxide particles were fine and homogeneous. The alloy with 5wt% silicon had the best oxidation resistance at high temperature.
中图分类号 TG172.82 DOI 10.11973/jxgccl201904003
所属栏目 试验研究
基金项目 广西自然科学基金资助项目（2015GXNSFAA139252）；广西大学生创新创业项目（201710593232）
收稿日期 2018/3/27
修改稿日期 2019/3/25
网络出版日期
作者单位点击查看
备注王二鹏(1997-),男,河南南阳人,本科生
引用该论文: WANG Erpeng,LIU Haifei,GUO Wen,LU Mingyang,ZHENG Bingxin,YAN Haiju,ZHANG Xiuhai. Oxidation Resistance at 1 000℃ of Ni-15Cr-5Al-xSi Alloys[J]. Materials for mechancial engineering, 2019, 43(4): 10～14
王二鹏,刘海飞,郭文,陆名扬,郑冰欣,闫海居,张修海. Ni-15Cr-5Al-xSi合金在1 000 ℃下的抗氧化性能[J]. 机械工程材料, 2019, 43(4): 10～14
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【11】WANG Y, LIU Y, TANG H P, et al. Oxidation behavior and mechanism of porous nickel-based alloy between 850 and 1000℃[J]. Transactions of Nonferrous Metals Society of China, 2017, 27(7):1558-1568.
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【13】孙朝阳, 陈桂才, 武传标, 等. 典型耐热镍基合金抗高温氧化行为研究[J]. 腐蚀科学与防护技术, 2014, 26(4):345-349.
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