Wear-driven tool failure is one of the main hurdles in the industry. This issue can be addressed through surface coating with ceramic-reinforced metal matrix composites. However, the maximum ceramic content is limited by cracking. In this work, the tribological behaviour of the functionally graded WC-ceramic-particle-reinforced Stellite 6 coatings is studied. To that end, the wear resistance at room temperature and 400 °C is investigated. Moreover, the tribological analysis is supported by crack sensitivity and hardness evaluation, which is of utmost importance in the processing of composite materials with ceramic-particle-reinforcement. Results indicate that functionally graded materials can be employed to increase the maximum admissible WC content, hence improving the tribological behaviour, most notably at high temperatures. Additionally, a shift from abrasive to oxidative wear is observed in high-temperature wear testing.

磨损驱动的刀具故障是该行业的主要障碍之一。这个问题可以通过陶瓷增强金属基复合材料的表面涂层来解决。然而，最大陶瓷含量受到裂纹的限制。在这项工作中，研究了功能梯度 WC 陶瓷颗粒增强 Stellite 6 涂层的摩擦学行为。为此，研究了室温和 400 °C 下的耐磨性。此外，摩擦学分析得到裂纹敏感性和硬度评估的支持，这在陶瓷颗粒增强复合材料的加工中至关重要。结果表明，功能梯度材料可用于增加最大允许的 WC 含量，从而改善摩擦学行为，尤其是在高温下。此外，在高温磨损测试中观察到从磨料磨损到氧化磨损的转变。