ABSTRACT Hexagonal boron nitride (h-BN) particles were added to a sliver metal matrix to improve the tribological properties of the prepared Ag–BN coatings, which were deposited via plasma spraying technique. The morphology, flowability and apparent density of Ag–BN composite powders were characterized, as well as the phase composition, microstructure and friction properties of Ag–BN coatings were systematically investigated. Results of XRD showed that Ag–BN coatings were successfully prepared, morphologies of SEM showed dense structures of Ag–BN coatings. The friction and wear behaviour of Ag–BN coatings was investigated from ambient temperature up to 800°C. The results showed that the coatings exhibited excellent tribological properties in this temperature range. The main wear mechanisms of Ag–BN coating were adhesive wear and ploughing. Layered h-BN reduced the friction coefficient and improved abradable property of Ag–BN coatings. Ag as the metal phase effectively protected the Si3N4 ball from wear.

中文翻译：

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等离子喷涂制备的Ag-BN涂层的摩擦学行为

摘要将六方氮化硼 (h-BN) 颗粒添加到银金属基体中，以改善通过等离子喷涂技术沉积的制备的 Ag-BN 涂层的摩擦学性能。表征了Ag-BN复合粉末的形貌、流动性和表观密度，并系统地研究了Ag-BN涂层的相组成、微观结构和摩擦性能。XRD结果表明成功制备了Ag-BN涂层，SEM形貌显示Ag-BN涂层的致密结构。研究了从环境温度到 800°C 的 Ag-BN 涂层的摩擦和磨损行为。结果表明，涂​​层在该温度范围内表现出优异的摩擦学性能。Ag-BN涂层的主要磨损机制是粘着磨损和犁耕。层状 h-BN 降低了摩擦系数并提高了 Ag-BN 涂层的耐磨性。Ag 作为金属相有效地保护了 Si3N4 球免受磨损。