The influence of residual stresses in selected non-oxide ceramics composites on their wear resistance in different environments
Zbigniew Pędzich, Grzegorz Grabowski, Izabela Saferna, Magdalena Ziąbka, Agnieszka Gubernat, Marcin Kot
Quarterly No. 4, 2015 pages 203-208
DOI:
keywords: ceramic matrix composites, abrasive wear, silicon carbide, silicon nitride, particulate composites, dry sand test, Miller test
abstract The application of structural non-oxide ceramics is at present a common trend in machines and the construction of mechanical devices. Dense ceramic sinters made of silicon carbide or silicon nitride very often replace metallic parts. The advantages of ceramics are especially evident when they work as parts of machinery exposed to the action of loose and hard particles. The paper compares the abrasive wear susceptibility of both the mentioned phases and two particulate composites made on SiC and Si3N4 matrices. Two types of tests were performed. The Dry Sand Test, which indicates the wear susceptibility of the material to wear during the abrasive action of hard particles without any lubricant, was the first one. The Miller Test was the second. This test examined the wear of materials during the action of hard particles in a wet environment (pulp). In both tests the same abrasive, silicon carbide powder, was used.