Tribological properties of laser cladding NiAl intermetallic compound coatings at elevated temperatures

Tribological properties of laser cladding NiAl intermetallic compound coatings at elevated temperatures
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激光熔覆NiAl金属间化合物涂层的高温摩擦学性能

DOI:
10.1016/j.triboint.2016.09.014
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发表时间:
2016-12
影响因子:
6.2
通讯作者:
Silong Cao
Silong Cao
中科院分区:
工程技术1区
文献类型:
--
作者:
Youjun Yu;Jiansong Zhou;Shufang Ren;Lingqian Wang;Benbin Xin;Silong Cao

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研究了激光熔覆NiAl涂层在室温至1000 °C空气气氛下的摩擦学性能、相组成及磨损机理。结果表明,高温下磨损表面形成了由NiO、Ni 2 O3、Al 2 O3和NiAl 2 O 4相以及Ni 3Al相组成的釉层,作为固体润滑和抗磨材料,改善了NiAl涂层的高温摩擦学性能。在500 °C以下,磨损机制以磨粒磨损为主;在500 °C ~ 700 ° C,磨损机制转变为塑性变形和粘着磨损;在900 °C以上,由于摩擦化学反应生成新的氧化物相,磨损机制转变为氧化磨损。
Tribological properties, phase compositions and wear mechanisms of laser cladding NiAl coating were investigated from room temperature to 1000 °C under air atmosphere environment. The results showed that a glaze layer composed of NiO, Ni2O3, Al2O3and NiAl2O4phases as well as Ni3Al phase were formed on worn surface under high temperature, which act as a solid lubricant and anti-wear material improving the tribological properties of NiAl coating at elevated temperatures. The wear mechanism is dominated by abrasive wear below 500 °C, and transforms to plastic deformation and adhesive wear at 500 °C up to 700 °C and oxidation wear at 900 °C and above, owing to formation of new oxide phase during tribochemical reaction.
添加氧化物的 NiAl 基复合材料的高温摩擦学行为
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