Effect of nickel boride additive on simultaneous densification and phase decomposition of TiB2-WB2 solid solutions by pressureless sintering using induction heating

被引：17

作者：

Shibuya, M. ^{[1
]}

Ohyanagi, M. ^{[1
]}

机构：

[1] Ryukoku Univ, Dept Mat Chem & HRC, Otsu, Shiga 5202134, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 01期

关键词：

sintering; composite; microstructure; mechanical properties; borides; TiB2; WB2;

D O I：

10.1016/j.jeurceramsoc.2006.05.081

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：

Short time process of simultaneous densification and phase decomposition of TiB2-WB2 solid solutions by pressureless sintering using induction heating has been investigated. The products were obtained by sintering of mixture powder compacts of (Ti,W)B-2 with nickel and boron (Ni/B = 3/1) varying between 0 and 7.5 wt.%. It was found that the presence of nickel boride as an additive markedly enhances the kinetics of the subsequent densification and decomposition from the (Ti,W)B-2 single phase to the two phases of (Ti,W)B-2 and (WTi)B-2. The sintered products were evaluated using X-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy analysis. In an addition of 7.5 wt.%, the product with a relative density of 91 % is produced by induction heating for only 600 s. The mechanical properties of the product, which improved by densification and decomposition of (Ti,W)B-2, is also presented. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：301 / 306

页数：6

共 24 条

[1]

Castaing J., 1977, Boron and refractory borides, P390

[2]

Einarsrud MA, 1997, J AM CERAM SOC, V80, P3013, DOI 10.1111/j.1151-2916.1997.tb03227.x

[3]

FERBER MK, 1983, J AM CERAM SOC, V66, pC2, DOI 10.1111/j.1151-2916.1983.tb09974.x

[4]

GRAZIANI T, 1992, REFR MET HARD MAT, V11, P105

[5]

Gülsoy HÖ, 2005, SCRIPTA MATER, V52, P187, DOI [10.1016/j.scriptamat.2004.09.032, 10.1016/j.sciptamat.2004.09.032]

[6] CONSOLIDATION OF COMBUSTION-SYNTHESIZED TITANIUM DIBORIDE-BASED MATERIALS [J].

HOKE, DA ;

MEYERS, MA .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (02) :275-284

[7] Microstructure of TiC-TiN-Ni-(B) cermet systems [J].

Jung, J ;

Kang, S .

POWDER METALLURGY, 2002, 45 (01) :83-89

[8] Synthesis of hard materials by field activation:: The synthesis of solid solutions and composites in the TiB2-WB2-CrB2 system [J].

Kaga, H ;

Heian, EM ;

Munir, ZA ;

Schmalzried, C ;

Telle, R .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (12) :2764-2770

[9] Induction-field-activated self-propagating high-temperature synthesis of AlN-SiC solid solutions in the Si3N4-Al-C system [J].

Kata, D ;

Ohyanagi, M ;

Munir, ZA .

JOURNAL OF MATERIALS RESEARCH, 2000, 15 (11) :2514-2525

[10] Two-step sintering of a TiB2Ni cermet [J].

Kim, WJ ;

Kim, DH ;

Kang, ES ;

Kim, DK ;

Kim, CH .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (21) :5805-5809

← 1 2 3 →