Effects of CeO2 additive on the microstructure and mechanical properties of in situ TiB2/Al composite

被引：44

作者：

Xue, Jing ^{[1
]}

Wang, Jun ^{[1
]}

Han, Yanfeng ^{[1
]}

Li, Pan ^{[1
]}

Sun, Baode ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 05期

关键词：

In situ TiB2 particle; Rare earth CeO2; Dispersion; Mechanical properties; AL-TIB2; COMPOSITE; GRAIN-REFINEMENT; WEAR BEHAVIOR; ALUMINUM; PERFORMANCE; PARTICLES; ALLOY;

D O I：

10.1016/j.jallcom.2010.10.152

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, CeO2 was investigated as an additive for in situ preparation of TiB2/Al composite using an exothermic reaction process via K2TiF6 and KBF4 salts. Experimental results indicated that when 0.5 wt.% CeO2 additive was added, the dispersion of TiB2 particles was improved significantly. Meanwhile, alpha-Al matrix grain was further refined. Compared with the composite without CeO2, the ultimate tensile strength, yield strength, elastic modulus and tensile elongation increased by 8%, 7%, 26% and 14%, respectively in as-cast condition, and the tensile fracture behavior of the composite with CeO2 belonged to a typical ductile fracture with microvoid coalescence. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1573 / 1578

页数：6

共 26 条

[1]

Davies P., 1992, KEY ENG MATER, V77-78, P357, DOI 10.4028/www.scientific.net/KEM.77-78.357

[2] On the precipitation of TiB2 in aluminum melts from the reaction with KBF4 and K2TiF6 [J].

Fjellstedt, J ;

Jarfors, AEW .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 413 :527-532

[3] Influence of high-intensity ultrasound on grain refining performance of Al-5Ti-1B master alloy on aluminium [J].

Han, YF ;

Li, K ;

Wang, J ;

Shu, D ;

Sun, BD .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 405 (1-2) :306-312

[4] Effect of in situ TiB2 particle reinforcement on the creep resistance of hypoeutectic Al-12Si alloy [J].

Huang, MW ;

Li, XF ;

Yi, HZ ;

Ma, NH ;

Wang, HW .

JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 389 (1-2) :275-280

[5] The dispersion mechanism of TiB2 ceramic phase in molten aluminium and its alloys [J].

Jha, A ;

Dometakis, C .

MATERIALS & DESIGN, 1997, 18 (4-6) :297-301

[6] SETTLING OF SIC PARTICLES IN AN ALSI7MG MELT [J].

KOLSGAARD, A ;

BRUSETHAUG, S .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 173 (1-2) :213-219

[7] The influence of room temperature and cryogenic temperature rolling on the aging and wear behaviour of Al-4Cu-5TiB2 in situ composites [J].

Kumar, S. ;

Sarma, V. Subramanya ;

Murty, B. S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 479 (1-2) :268-273

[8]

Lakshmi S, 1998, J MATER PROCESS TECH, V73, P160, DOI [10.1016/S0924-0136(97)00225-2, 10.1163/156855197X00157]

[9] The effect of rare earth CeO2 on microstructure and properties of in situ TiC/Al-Si composite [J].

Liu, YM ;

Xu, BF ;

Li, WY ;

Cai, X ;

Yang, ZW .

MATERIALS LETTERS, 2004, 58 (3-4) :432-436

[10] Al-4 wt% Cu composite reinforced with in-situ TiB2 particles [J].

Lu, L ;

Lai, MO ;

Chen, FL .

ACTA MATERIALIA, 1997, 45 (10) :4297-4309

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