摘要
The oxidation behaviors of Nb67-xW15Si18Hfx (x=0, 5, 10) alloys were studied at 1 250℃in air. It is found that the Nb67W15Si18 alloy has the best oxidation resistance among the three alloys; and Hf addition is harmful to the oxidation resistance of the Nb67W15Si18 alloy. The oxides formed on the Nb67W15Si18 alloy are mainly Nb12WO33 and NbO2, and that on the Nb62W15Si18Hf5 and Nb57W15Si18Hf10 alloys is Nb2O5. Effect of Hf on the oxidation behavior of the Nb67-xW15Si18Hfx alloys has been discussed based on microstructures and kinetics of oxidation.
The oxidation behaviors of Nb67-xW15Si18Hfx （x=0, 5, 10） alloys were studied at 1 250 ℃ in air. It is found that the Nb67W15Si18 alloy has the best oxidation resistance among the three alloys; and Hf addition is harmful to the oxidation resistance of the Nb67W15Si18 alloy. The oxides formed on the Nb67W15Si18 alloy are mainly Nb12WO33 and NbO2, and that on the Nb62W15Si18Hf5 and Nb57W15Si18Hflo alloys is Nb2O5. Effect of Hfon the oxidation behavior of the Nb67-xW15Si18Hfx alloys has been discussed based on mierostructures and kinetics of oxidation.
出处
《中国有色金属学会会刊：英文版》
CSCD
2006年第A03期2009-2012,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(50671002) supported by the National Natural Science Foundation of China
关键词
镍合金
高温氧化
抗氧化性
熔炼温度
Nb-Si based alloys
Ni67-xW15Si18Hfx alloys
high-temperature oxidation
oxidation resistance
oxide
