Effect of the boriding environment on the wear response of laser-clad AlCoCrFeNi high entropy alloy coatings
Effect of the boriding environment on the wear response of laser-clad AlCoCrFeNi high entropy alloy coatings
复制标题
DOI：
10.1016/j.surfcoat.2022.128830
复制
发表时间：
2022-08-31
影响因子：
5.4
通讯作者：
Lampke, T.
中科院分区：
文献类型：
--
作者：
Guenen, A.;Lindner, T.;Lampke, T.
在aisi316l不锈钢表面制备激光熔覆AlCrFeCoNi高熵合金（HEA）涂层，在1000 ？在露天、高纯度氩气和真空环境中加热4小时。初始硬度为6.14 +/- 2.06 GPa的HEA在渗硼过程中表面形成了由（CoFe）B-2、（CrFe）B(2)和Cr(2)Ni(3)B(6)相组成的复合硼化物层，硬度范围为15.95 +/- 0.7 ~ 20.15 +/- 4.50 GPa。真空渗硼试样的渗硼层厚度最大，空气渗硼试样的表面硬度最高。与未处理的对照样品相比，含硼涂层在25 ？C和650 ?C。在650℃时，渗硼涂层的摩擦系数也有所降低。650时的磨损损失？C显著高于25°C。
Laser-clad AlCrFeCoNi high entropy alloy (HEA) coatings, produced on the surface of AISI 316 L stainless steel, were pack-borided at 1000 ?C for 4 h in open air, high-purity Ar and vacuum environments. The HEA, which had an initial hardness of 6.14 +/- 2.06 GPa, formed a complex boride layer consisting of (CoFe)B-2, (CrFe)B(2 )and Cr(2)Ni(3)B(6 )phases on its surface, with hardness ranging from 15.95 +/- 0.7 to 20.15 +/- 4.50 GPa as a result of the boriding process. While the greatest boride layer thickness was obtained in the sample borided in vacuum, the highest surface hardness was obtained in the sample borided in air. The borided coatings showed improved wear resistance and lower friction values compared to the untreated control samples, both at 25 ?C and 650 ?C. The borided coatings also showed reduced coefficients of friction at 650 ?C. The wear losses at 650 ?C significantly exceeded those at 25 ?C.