Tribological characteristics of AZ91/B₄C surface composites were studied under air and argon gas environments. Tests were conducted under a constant normal load of 10 N, with a sliding velocity of 0.06 m/s using a linear reciprocating tribometer. Wear tracks and debris were analyzed using scanning electron microscopy, three-dimensional contour topography, and energy-dispersive X-ray spectroscopy in order to understand the wear mechanisms. The wear rate of the specimen tested under the argon environment was found to be lower (∼60%) in comparison with that of the specimen tested under the open-air environment. The value of the friction coefficient was found to be minimum under the argon environment compared with the air environment. In the air environment, the major material loss from the test specimen was attributed to oxidation wear; whereas under the argon environment, strain-hardening effect was dominant, and the material was found to be removed by delamination wear. In addition, the worn surface morphology of the wear tracks and counter surfaces showed the involvement of abrasion and adhesion wear mechanisms. The results of the study pave the pathway for the design of lightweight surface composite material systems such as AZ91/B₄C toward an efficient and robust tribo-pair applicability for a controlled environment.

AZ91 / B _4的摩擦学特性在空气和氩气环境下研究了C表面复合材料。使用线性往复式摩擦计在10 N的恒定法向载荷下以0.06 m / s的滑动速度进行测试。使用扫描电子显微镜，三维轮廓形貌和能量色散X射线光谱分析了磨损痕迹和碎屑，以了解磨损机理。与在露天环境下测试的样品相比，在氩气环境下测试的样品的磨损率更低（约60％）。发现在氩气环境下与空气环境相比，摩擦系数的值最小。在空气环境中，试样的主要材料损失归因于氧化磨损。而在氩气环境下 应变硬化作用是主要的，并且发现该材料通过分层磨损而被去除。另外，磨损轨迹和相对表面的磨损表面形态显示出磨损和粘附磨损机制的参与。研究结果为设计轻质表面复合材料系统（例如AZ91 / B）铺平了道路₄ C朝着在受控环境下高效而强大的摩擦对适用性迈进。