Preparation of TiC/SiC composites from Ti-enriched slag by an electrochemical process in molten salts

被引：28

作者：

Chen, Konghao ^{[1
]}

Hua, Yixin ^{[1
,2
]}

Xu, Cunying ^{[1
,2
]}

Zhang, Qibo ^{[1
,2
]}

Qi, Cancan ^{[1
]}

Jie, Yafei ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

[2] State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Electrochemical preparation; TiC/SiC composites; Ti-enriched slag; FFC-CAMBRIDGE PROCESS; CALCIUM-CHLORIDE; TITANIUM-DIOXIDE; ELECTRO-REDUCTION; PRECURSORS; CACL2; EXTRACTION; TI5SI3; OXIDES; SI;

D O I：

10.1016/j.ceramint.2015.05.106

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

TiC/SiC composites were successfully prepared from Ti-enriched slag via an electro-deoxidization process in molten CaCl2-NaCl eutectic melt at 700 degrees C in argon. Electrolysis was conducted at an applied voltage of 3.2 V using a graphite anode and a composite cathode composed of graphite powder and Ti-enriched slag. According to the results, a possible reaction pathway was suggested: firstly the complex Ti-compounds were decomposed into TiO2-based simple oxides; then a mass of CaTiO3 and a spot of CaSiO3 formed accompanied by the reduction of titanium dioxide to titanium sub-oxide such as TiO, Ti2O; finally the graphite powder involved in the formation of SiC, TiC1-xOx, which were further converted into SiC and TiC by prolonging electrolysis. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：11428 / 11435

页数：8

共 38 条

[1] The electro-deoxidation of dense titanium dioxide precursors in molten calcium chloride giving a new reaction pathway [J].

Alexander, D. T. L. ;

Schwandt, C. ;

Fray, D. J. .

ELECTROCHIMICA ACTA, 2011, 56 (09) :3286-3295

[2] Titanium carbide-iron composite coatings by reactive plasma spraying of ilmenite [J].

Ananthapadmanabhan, PV ;

Taylor, PR .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 287 (1-2) :121-125

[3]

[Anonymous], 1974, OUT HSC CHEM WIND CH, P1974

[4]

Chen G. Z., 2014, MINER PROCESS EXTR C

[5] Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride [J].

Chen, GZ ;

Fray, DJ ;

Farthing, TW .

NATURE, 2000, 407 (6802) :361-364

[6] Characterization of sintered TiC-SiC composites [J].

Chen, Jing ;

Li, WenJun ;

Jiang, Wan .

CERAMICS INTERNATIONAL, 2009, 35 (08) :3125-3129

[7] Spark plasma sintering of TiC-based composites toughened by submicron SiC particles [J].

Cheng, Lixia ;

Xie, Zhipeng ;

Liu, Guanwei .

CERAMICS INTERNATIONAL, 2013, 39 (05) :5077-5082

[8] A simple method of synthesis and surface purification of titanium carbide powder [J].

Dyjak, Slawomir ;

Norek, Malgorzata ;

Polanski, Marek ;

Cudzilo, Stanislaw ;

Bystrzycki, Jerzy .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2013, 38 :87-91

[9] MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF HOT-PRESSED SIC-TIC COMPOSITES [J].

ENDO, H ;

UEKI, M ;

KUBO, H .

JOURNAL OF MATERIALS SCIENCE, 1991, 26 (14) :3769-3774

[10] Reduction of titanium and other metal oxides using electrodeoxidation [J].

Fray, DJ ;

Chen, GZ .

MATERIALS SCIENCE AND TECHNOLOGY, 2004, 20 (03) :295-300

← 1 2 3 4 →