Improvements in mechanical properties of TiB2 ceramics tool materials by the dispersion of Al2O3 particles

被引：63

作者：

Gu, Meilin ^{[1
,2
]}

Huang, Chuanzhen ^{[2
]}

Xiao, Shourong ^{[2
]}

Liu, Hanlian ^{[2
]}

机构：

[1] Hebei Univ Technol, Sch Mech Engn, Tianjin 300130, Peoples R China

[2] Shandong Univ, Sch Mech Engn, Ctr Adv Jet Engn Technol, Jinan 250061, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 486卷 / 1-2期

关键词：

TiB2; Al2O3; cutting tools; microstructure; mechanical properties;

D O I：

10.1016/j.msea.2007.09.040

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

TiB2-Al2O3 composites with Ni-Mo as sintering aid have been fabricated by a hot-press technique at a lower temperature of 1530 degrees C for 1 h, and the mechanical properties and microstructure were investigated. The microstructure consists of dispersed Al2O3 particles in a fine-grained TiB2 matrix. The addition of Al2O3 increases the fracture toughness up to 6.02 MPa m(1/2) at an amount of 40 vol.% Al2O3 and the flexural strength up to 913.86 MPa at an amount of 10 vol.% Al2O3. The improved flexural strength of the composites is a result of higher density than that of monolithic TiB2. The increase of fracture toughness is a result of crack bridging by the metal grains on the boundaries, and crack deflection by weak grain boundaries due to the bad wetting characters between Ni-Mo and Al2O3. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：167 / 170

页数：4

共 11 条

[1]

BAUMGARTNER HR, 1984, J AM CERAM SOC, V67, P207, DOI 10.1111/j.1151-2916.1984.tb19744.x

[2] GRAIN-SIZE DEPENDENCE OF MICROCRACK INITIATION IN BRITTLE MATERIALS [J].

CASE, ED ;

SMYTH, JR ;

HUNTER, O .

JOURNAL OF MATERIALS SCIENCE, 1980, 15 (01) :149-153

[3]

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

[4] PERSPECTIVE ON THE DEVELOPMENT OF HIGH-TOUGHNESS CERAMICS [J].

EVANS, AG .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (02) :187-206

[5] New binder phases for the consolidation of TiB2 hardmetals [J].

Gonzalez, R ;

Barandika, MG ;

Ona, D ;

Sanchez, JM ;

Villellas, A ;

Valea, A ;

Castro, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1996, 216 (1-2) :185-192

[6] Effect of nano-scale Al2O3 on mechanical properties of TiB2 ceramic tool materials [J].

Gu, M. L. ;

Huang, C. Z. ;

Wang, J. .

ADVANCES IN MACHINING & MANUFACTURING TECHNOLOGY VIII, 2006, 315-316 :123-126

[7] Effect of (Ni, Mo) and TiN on the microstructure and mechanical properties of TiB2 ceramic tool materials [J].

Gu, Meilin ;

Huang, Chuanzhen ;

Zou, Bin ;

Liu, Binqiang .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 433 (1-2) :39-44

[8] IMPROVEMENTS IN MECHANICAL-PROPERTIES OF TIB2 BY THE DISPERSION OF B4C PARTICLES [J].

KANG, ES ;

KIM, CH .

JOURNAL OF MATERIALS SCIENCE, 1990, 25 (1B) :580-584

[9] DENSIFICATION AND SHRINKAGE DURING LIQUID-PHASE SINTERING [J].

KANG, SJL ;

KIM, KH ;

YOON, DN .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (02) :425-427

[10] INFLUENCE OF GRAIN-SIZE ON EFFECTS OF THERMAL-EXPANSION ANISOTROPY IN MGTI2O5 [J].

KUSZYK, JA ;

BRADT, RC .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1973, 56 (08) :420-423

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