Effect of Zr and Ti on isothermal oxidation behavior of Nb–Si based alloys  

作　　者：Ankang Sun Ziqiang Dong Shuang Yang Jintao Shu Yanjie Liu Yi Liu Yongwang Kang Dinggang Wang Jinxia Song 

机构地区：[1]Materials Genome Institute,Shanghai University,Shanghai,200444,China [2]Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Beijing,100095,China

出　　处：《Progress in Natural Science:Materials International》2022年第2期226-235,共10页自然科学进展·国际材料（英文版）

基　　金：the financial support from Shanghai Pujiang Program(Grant No.20PJ1403700);Basic Scientific Research Program(JCKYS2020213002);National Key Research and Development Program of China(2017YFB0702901);Key Program of Science and Technology of Yunnan Province(Grant No.202002AB080001-2).

摘　　要：The isothermal oxidation behavior of 56Nb-16Si-(20-x)Ti–3Cr–3Al-2Hf-xZr(x?0,2,5,10 at.%)alloys was investigated at 800℃ and 1250℃,respectively.The results show that increasing the Zr content evidently increased the oxidation rates at 800℃,accompanied by the obvious occurrence of pesting oxidation.The alloys showed alike linear oxidation kinetics at 1250℃.With the increase of Zr content,the adherence and integrity of oxide scales were improved,but the overall oxidation resistance was slightly deteriorated.The observed oxidation behavior may be attributed to the composition variation of Zr and Ti in the alloys.The oxidation mechanism associated with the composition variation is discussed in this study.

关 键 词：NIOBIUM SILICIDE Oxidation ZIRCONIUM TITANIUM 

分 类 号：TG146.416[一般工业技术—材料科学与工程]