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Microstructure-dependent oxidation behavior of Ni-Al single-crystal alloysJianlu Pei1,Yefan Li1,Chong Li1,Zumin Wang1,Yongchang Liu1,Huijun Li21. State Key Lab of Hydraulic Engineering Simulation...="ChDivSummary">The effect of the γ +γ two-phase structure on the oxidation behaviors of Ni-Al single-crystal alloys at 650℃ was investigated by scanning electron microscopy, transmission electron microscopy......
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; 文献标志码:A Microscopic phase-field simulation for influence of Ni-Al interaction energy on ordering behavior of Ni75Al14Mo11 alloy atoms MA Qing-shuang, JIN Yu-chun, ZHAO Yu-hong, HOU Hua, WANG Xin... layer on the ordering behavior of Ni75Al14Mo11 alloy atoms and the precipitation of γ′ phase was investigated by the microscopic phase-field kinetic model. The results show that as the first Ni-Al......
Microstructure and mechanical properties of twin-wire arc sprayed Ni-Al composite coatings on 6061-T6 aluminum alloy sheetJi-xiao Wang1,2,Jing-shun Liu3,Lun-yong Zhang4,Jian-fei Sun1,Zhi-ping Wang51...,the interface diffusion area between the Ni-Al coating and the substrate gradually expands with the formation of NiAl3 and Ni2Al3 phases,and is controlled by diffusion of aluminum atoms.The grain growth......
Ni-Al二元合金的TB势参数 Table 1 TB potential parameters of Ni-Al binary alloy 将500个原子(按照合金成分配比)置于一个立方体盒子中,并让系统在三维周期边界条件下分别以4×1013和4×1011 K/s两种冷却速率进行冷却,时间步长选定为2.5 fs.模拟过程中采用NTP系综,首先让系综在2 000 K等温运... PCF curves of liquid alloy NiAl at different temperatures with cooling rate of 4×1013 K/s: (a) gNi-Ni(r); (b) gNi-Al(r); (c) gAl-Al(r); (d) gtot(r) 图4 冷却速率为4×1011 K/s时不同温度下液态合金NiAl的偶分布函数曲线......
of Ni-Al alloy systems. The present work was thus carried out to investigate the effect of growth velocity on the microstructure selection during the directional solidification of the Ni-25%Al (atom... Ni-Al alloy Vertical directional solidification experiments were carried out at various velocities ranging from 10 to 100 μm/s under a given thermal gradient, G=10 K/mm. A modified Bridgman type......
文章编号:1004-0609(2012)06-1725-06 Ni-Al基涂层制备工艺及其抗氧化性能 欧桃平,操光辉 (上海大学 材料科学与工程学院,上海 200072) 摘 要:通过调整固体粉末渗铝法工艺在镍基高温合金DZ417G基体上制备了Ni-Al二元成分区间内组织可控的γ′-Ni3Al,γ′-Ni3Al+β-NiAl,β-NiAl,β-NiAl+δ-Ni2Al3和...; 文献标志码:A Preparation processes of Ni-Al-based coatings and their oxidation resistance OU Tao-ping, CAO Guang-hui (School of Materials Science and Engineering, Shanghai University, Shanghai......
: 115-119. [9] IZAKI M, FUKUSUMI M, ENOMOT H. High temperature oxidation resistance of Ni-Al alloy films prepared by heating electrodeposited composite [J]. J Japan Inst Met, 1993, 57: 182-189. [10... Science, 2007, 49: 3453-3478. [14] ZHOU Y B, ZHAO G G, ZHANG H J. Effect of CeO2 on the microstructure and isothermal oxidation of Ni-Al alloy coatings transformed from electrodeposited Ni-Al films......
Characteristics of mechanical alloyed Ni-Al powder for sinteringMENG Jie, JIA Chengchang, and HE Qing Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China摘 要:Mechanical alloying was employed to obtain high-activity Ni-Al powder. The effects of mechanical alloying on the microstructure......
Ni-Al金属间化合物多孔材料的制备吴靓,贺跃辉,董虹星摘 要:以Ni,Al元素混合粉末为原料,用冷压成形和两阶段固态偏扩散反应烧结法制备Ni-Al金属间化合物多孔材料,系统地研究合金成分,Al粉粒度和烧结温度对孔结构的影响.研究结果表明:随着铝含量增加开孔隙率先缓慢增大而后迅速增大,最大孔径和透气度也随铝含量的增加而增大,开孔隙度则随温度升高增大到一定值后呈减小趋势;随着Al粉粒度增大,最大孔径和透气度都增加,透气度的增加趋势更为显著.关键词:Ni-Al合金;多孔材料;元素粉末冶金;......
