Microstructural characterization and mechanical behaviours of TiN-graphite composites fabricated by spark plasma sintering

被引：13

作者：

Akinribide, Ojo Jeremiah ^{[1
,3
]}

Obadele, Babatunde Abiodun ^{[2
]}

Akinwamide, Samuel Olukayode ^{[1
]}

Ayeleru, Olusola Olaitan ^{[1
]}

Eizadjou, Mehdi ^{[3
]}

Ringer, Simon P. ^{[3
]}

Olubambi, Peter Apata ^{[1
]}

机构：

[1] Univ Johannesburg, Ctr Nanoengn & Tribocorros, Sch Min Met & Chem Engn, Johannesburg, South Africa

[2] Botswana Int Univ Sci & Technol, Dept Chem Mat & Met Engn, Private Bag 016, Palapye, Botswana

[3] Univ Sydney, Australian Ctr Microscopy & Microanal, Sch Aerosp, Mech,Mechatron Engn, Sydney, NSW 2006, Australia

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2020年 / 91卷

基金：

新加坡国家研究基金会;

关键词：

Milling; TiCN; Graphite; Sintering; Microstructure; Hardness; Fracture toughness; PULSED-LASER ABLATION; TITANIUM CARBIDE; RAMAN-SPECTROSCOPY; METAL CARBIDES; CARBON; EVOLUTION; DEPOSITION; REDUCTION; GROWTH; FILMS;

D O I：

10.1016/j.ijrmhm.2020.105253

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of milling time on the particle size distribution (PSD), densification, microstructure, hardness and fracture toughness of spark plasma sintered (SPS) TiN + graphite ceramic were studied. TiN with varying amount of graphite (1, 3, and 5 wt%) were milled at different milling time (8, 24 and 40 h), thereafter sintered at sintering temperature of 1800 degrees C, holding time of 10 min and pressure of 50 MPa. The relative density and hardness increased as milling time progressed from 24 to 40 h, however, the relative density, hardness, and particle size decreased after 8 h of milling. The microstructural analyses showed that a fully sintered TiN + graphite compact could be achieved at sintering temperature of 1800 degrees C, with no significant grain growth. Residual stress effect of TiN+ 5 wt% graphite composite was analyzed using XRD method and the result indicated that there is no significant residual stress on the sample. The relative density, Vickers hardness and fracture toughness of TiN+ 1 wt% Gr, milled for 40 h were 99.24%, 13.90 GPa and 4.0 MPa.m(1/2) respectively.

引用

页数：13

共 53 条

[1] Microstructural and phase evolution of spark plasma sintering of graphitized Ti (C0.9N0.1) composites [J].