Properties of sputtered NiCrAlY used for protective gun tube coatings
NiCrAlY coatings were deposited on CrNi3MoVA steel substrates by means of magnetron sputtering. The coatings were characterized in terms of their microstructure, hardness, friction coefficient, high-temperature oxidation resistance. Micro-indentation and tribometer testers were employed to measure the mechanical properties of NiCrAlY coatings and CrNi3MoVA steel. The results showed that the hardness of the coatings ranged from 5.7 to 5.9 GPa, with a higher value than that of CrNi3MoVA steel(4.1-4.3 GPa). The coefficient of steady-state friction of the coatings against 45-carbon-steel balls ranged from 0.35 to 0.40, with a lower value than that of CrNi3MoVA steel(0.63-0.68). The isothermal oxidation behavior at 850℃ of the coatings were studied in comparison with CrNi3MoVA steel substrates. The results indicated that NiCrAlY coatings substantially increase the high-temperature oxidation resistance of CrNi3MoVA steel and the oxidation process was retarded mainly by the presence of outer complex oxide scales and a continuous Al2O3 inner layer on the coating.
NiCrAlY coatings CrNi3MoVA steel sputtering mechenical properties oxidation
Jian Zhang Cean Guo Gang Zhang Chongrui Wang Shiming Hao
Northeastern University, Shenyang 110004, China Shenyang Ligong University, Shenyang 110159, China Shenyang Ligong University, Shenyang 110159, China Northeastern University, Shenyang 110004, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
613-617
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）