Articles
  • Tribology of SiO2 colloid coated Si3N4/SiC composites with/without TiO2 in accordance with heat treatment temperature considering economics

  • Hoseok Nama and Ki-Woo Namb,*

  • aBusan Development Institute, 955 Jungang-daero, Busanjin-gu, Busan 47210, Korea
    bDept. of Materials Science and Engineering, Pukyong National Univesity, 45 Yongso-ro, Nam-gu, Busan 48513, Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ceramics have high hardness, corrosion resistance, and abrasion resistance, but are easily fractured by micro crack. Many studies on self-healing have been conducted to eliminate the risk of micro crack on the surface. SiO2 is self-healing material, in which Si and O2 are combined. TiO2-added Si3N4/SiC composites were sintered. The SiO2 colloid was coated on the surface, and heat treated. The bending strength and abrasion characteristics were evaluated. The specimen with SiO2 colloid coating had higher strength than that of the uncoated specimen, and the strength of TiO2-added specimen also increased. The friction coefficient and wear loss of SiO2 colloid coated specimens were smaller than those of the uncoated specimens. The friction coefficient and wear loss of TiO2-added specimens were smaller than those without additives. The friction coefficient and wear loss decreased with increasing bending strength. Friction coefficient and wear loss according to the heat treatment temperature showed the reverse tendency to the bending strength. Therefore, TiO2-added ceramic will ensure economic efficiency


Keywords: Friction coefficient, Wear loss, SiO2 colloid, Coating times, Heat treatment temperature, Economics

This Article

  • 2021; 22(1): 66-73

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.66
  • Received on Jul 17, 2020
  • Revised on Aug 15, 2020
  • Accepted on Sep 3, 2020

Correspondence to

  • Ki-Woo Nam

  • Dept. of Materials Science and Engineering, Pukyong National Univesity, 45 Yongso-ro, Nam-gu, Busan 48513, Korea
    Tel : +82-51-629-6358 Fax: +82-51-629-6353

  • E-mail: namkw@pknu.ac.kr