Effect of Mechanical Properties on Wear Resistance of Si3N4 – SiC Ceramic Composite
Zuzana Gábrišová 1  
,   Pavol Švec 1  
,   Alena Brusilová 1  
 
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Faculty of Mechanical Engineering STU Bratislava, Institute of Technologies and Materials Námestie Slobody 17 812 31 Bratislava Slovak Republic
CORRESPONDING AUTHOR
Zuzana Gábrišová   

Faculty of Mechanical Engineering STU Bratislava, Institute of Technologies and Materials Námestie Slobody 17 812 31 Bratislava Slovak Republic
Publication date: 2020-12-01
 
Adv. Sci. Technol. Res. J. 2020; 14(4):156–167
 
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ABSTRACT
The effect of mechanical properties on wear resistance of Si3N4 - SiC composite materials with different portions of SiC strengthening phase was investigated. Properties of monolithic silicon nitride were compared to ceramic composites consisting of Si3N4 matrix with 10 and 20 vol.% SiC. The SiC strengthening phase had a positive effect on the hardness of Si3N4 - SiC ceramic composite materials. Wear resistance of tested ceramic materials was mainly influenced by their fracture toughness. The highest wear resistance value was achieved for material with the highest fracture toughness. Worn surfaces of all experimental ceramic materials were damaged by both microcutting and microcracking mechanism. Microcracking was the predominant wear mechanism mainly at ceramic composites. The wear resistance of SiC-Si3N4 ceramic composites can be described by the model W ~ HV/KIC.