In situ nanostructured (TiCr)CN coating by reactive plasma spraying. Issue 1 (January 2018)

• Record Type: Journal Article
• Authors: He, Jining; Nan, Zhaoshuai; Mi, Pengbo; Chen, Kai; Qin, Yanfang
• Is Part Of: Ceramics international. Volume 44:Issue 1(2018)
• Page Start: 712
• Page End: 717
• Publication Date: 2018-01
• Subjects: TiCr)CN coating -- Nanostructure -- Mechanical properties -- Wear resistance -- Reactive plasma spraying (RPS); Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.09.234
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In situ nanostructured (TiCr)CN composite coating was prepared by reactive plasma spraying Ti-Cr-graphite powder under air atmosphere. The phase composition, microstructure, mechanical properties and wear performance were investigated. The results show that the coating consists of a mixture of TiN, Ti(CN), (TiCr)N, Cr, Ti3 O, and amorphous graphite and CrN phases. The grain size is about 70 nm and the grains present equiaxed and columnar crystal morphologies. Moreover, 5 nm-sized nanocrystals are embedded in an amorphous phase. The (TiCr)CN composite coating possesses high hardness (1325 ± 120 HV) and toughness (4.35 ± 0.53 MPa m 1/2 ). The friction coefficient and wear rate of the coating are 0.46 and 3.01 ± 0.17 × 10 −6 mm 3 N −1 m −1, respectively. The inclusion of metallic phase Cr could improve the toughness and wear resistance of the (TiCr)CN coating.