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

被引：18

作者：

Akinribide, Ojo Jeremiah ^{[1
]}

Mekgwe, Gadifele Nicolene ^{[1
]}

Obadele, Babatunde Abiodun ^{[1
]}

Ajibola, Olawale Olarewaju ^{[1
]}

Akinwamide, Samuel Olukayode ^{[1
]}

Olubambi, Peter Apata ^{[1
]}

机构：

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

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2019年 / 78卷

基金：

新加坡国家研究基金会;

关键词：

Ti; (C-0.9; N-0.1); Porosity; Spark plasma sintering; Microhardness; Graphite; Microstructure; GRAIN-GROWTH; MECHANICAL-PROPERTIES; PERFORMANCE; CERMETS; VC;

D O I：

10.1016/j.ijrmhm.2018.09.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Graphite addition on the particle grain sizes, multiple phases and the ultrafine Ti (C-0.9, N-0.1) composite produced by means of spark plasma sintering (SPS) was examined by means of X-ray diffractometer (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS). From the results analysed, the presence of graphite increased the porosity of sintered Ti (C-0.9, N-0.1) cermet and thereby crippled the sinter ability of Ti (C-0.9, N-0.1). Significantly, graphite additions had an influence on particle size, morphology, microstructure and phases of ultrafine Ti (C-0.9, N-0.1) by inhibiting the dissolution of titanium carbonitride, outer rims phases and the inner rim formation, thereby causing grain growth reduction. Because of depressed dissolution and solution precipitate, graphite phase evolution in the composite has reduced. Furthermore, the presence of graphite improved the micro indentation hardness of Ti (C-0.9, N-0.1) composite and sintered relative density of the cermets.

引用

页码：164 / 169

页数：6

共 16 条

[1] Spark-plasma-sintering (SPS) of nanostructured titanium carbonitride powders [J].