Flexibly tailored microstructure and tribological properties of carbon/carbon composites via combination of h-BN powdered addition and heat-treatment. Issue 16 (November 2019)

• Record Type: Journal Article
• Authors: Li, Jinwei; Li, Yang; Li, Zhuan; Zhang, Bengu; Chen, Pengju; Niu, Zibo; Li, Zhichao; Xiao, Peng
• Is Part Of: Ceramics international. Volume 45:Issue 16(2019)
• Page Start: 20528
• Page End: 20538
• Publication Date: 2019-11
• Subjects: Carbon/carbon -- Tribological properties -- Heat-treatment -- Graphitization; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.07.032
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, hexagonal boron nitride powders (h-BN) and heat-treatment (HT) were used to tailor microstructures and tribological properties for Carbon/Carbon composites. The microstructures and tribological behaviors of virgin Carbon/Carbon, h-BN modified Carbon/Carbon, Carbon/Carbon after HT, and Carbon/Carbon modified by h-BN with HT were investigated. Results indicate that h-BN powdered addition as matrix leads to PyC matrix with higher texture degree, graphitization and micro-hardness, compared to virgin Carbon/Carbon composites. Moreover, compared to virgin Carbon/Carbon, the coefficient of friction (COF) of h-BN modified Carbon/Carbon composites are increased to 0.29 while wear rates (WR) are decreased to 1.65 μm·side −1 ·circle −1 . However, the Carbon/Carbon composites modified by h-BN and HT presented quite lower COF and WR, in comparison to virgin Carbon/Carbon and Carbon/Carbon after HT. In summary, flexibly tailored COF and WR could be achieved via BN powdered addition and/or HT.