纳米晶Fe_3Al材料的抗腐蚀性能和高温抗氧化性能  

Corrosion resistance and high-temperature anti-oxidation property of bulk nanocrystalline Fe3Al based materials

作　　者：喇培清[1] 楚成刚[1] 白亚平[1] 魏玉鹏[1] 孟倩[1] 卢学峰[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料国家重点实验室,兰州730050

出　　处：《粉末冶金材料科学与工程》2012年第3期361-364,共4页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(50674051)

摘　　要：通过铝热反应熔化法制备纯纳米晶Fe3Al材料以及添加质量分数分别为10%Ni,10%Cr,10%Mn,15%Mo,5%Cu和10%Cu合金元素的6种块体纳米晶Fe3Al材料;对含10%Ni的纳米晶Fe3Al材料分别进行600℃、1 000℃,8 h的等温处理。采用质量损耗法测定不同纳米晶Fe3Al材料在质量分数为5%H2SO4溶液中的均匀腐蚀速率;并研究各纳米晶Fe3Al材料在1 200℃空气中的高温氧化性能。结果表明:添加15%Mo和添加10%Cu的纳米晶Fe3Al材料较纯纳米晶Fe3Al材料抗腐蚀性能提高明显;含10%Ni的纳米晶Fe3Al材料经过600℃等温处理后的腐蚀速率略高于未等温处理的材料,而经1 000℃等温处理后腐蚀速率明显下降;随着合金元素Ni、Mn、Cr、Cu的加入,纳米晶Fe3Al材料的氧化速度增大,抗氧化性能降低。Bulk nanocrystaUine Fe3AI without and respectively with mass fraction of 10%Ni, 10%Cr, 10%Mn, 15%Mo,5%Cu and 10%Cu elements were prepared by aluminothermic reaction. Fe3Al material containing lO%Ni was annealed at 600 ℃ and 1 000 ℃ for 8 h, respectively. The uniform corrosion rate was tested in 5 % （mass fraction） H2SO4 solution with mass losing method, and the oxidation behaviors of alloys were studied at 1 200 ℃ in air. The results show that the corrosion resistance of bulk nanocrystalline Fe3Al with 15%Mo and 10%Cu increases significantly compared to the pure nanocrystalline Fe3Al. The corrosion rate of bulk nanocrystalline Fe3Al with 10%Ni increases slightly after annealed at 600 ℃, while decreases after annealed at 1 000 ℃. After respectively adding the alloy elements of Ni, Cr, Mn, Cu, the oxidation rate of nanocrystalline Fe3Al materials increases and the anti-oxidation property decreases.

关 键 词：合金元素 等温处理 抗腐蚀性能 抗氧化性 

分 类 号：TG174.21[金属学及工艺—金属表面处理]