SiAlONs can have new application areas by increasing their lifetime and durability if their mechanical and tribological properties are improved. Even though the properties of the matrix improve with GNPs addition, the differences in GNPs properties lead to different property values. In this study, four different GNPs having different surface area, lateral dimension, thickness, and aspect ratio were added to SiAlON and composites were sintered by using SPS. The effects of these different properties on fracture toughness and friction coefficient of SiAlONs were investigated. GNPs, which have the high surface area, lateral dimension, aspect ratio and low thickness, provided the highest fracture toughness and best friction coefficient performance to SiAlON. The fracture toughness of composites were generally higher in the in-plane direction compared to through-plane direction due to GNPs orientation. Conversely, the friction coefficient and hardness values measured higher in the through-plane direction than in the in-plane direction.

如果SiAlON的机械和摩擦性能得到改善，则可以通过增加其使用寿命和耐用性来将其应用于新的领域。即使添加GNP会改善基质的特性，但GNPs特性的差异也会导致不同的特性值。在这项研究中，将具有不同表面积，横向尺寸，厚度和长宽比的四个不同的GNP添加到SiAlON中，并使用SPS烧结复合材料。研究了这些不同性能对SiAlONs断裂韧性和摩擦系数的影响。具有高表面积，横向尺寸，长宽比和低厚度的GNP为SiAlON提供了最高的断裂韧性和最佳的摩擦系数性能。由于GNP的取向，复合材料的断裂韧性通常在面内方向上比通面方向上更高。相反，在贯穿平面方向上测得的摩擦系数和硬度值比在平面方向上高。