In-situ formation of Al2O3 nanoparticles during friction stir processing of Al-SiO2 composite

被引：52

作者：

You, G. L. ^{[1
]}

Ho, N. J. ^{[1
]}

Kao, P. W. ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Kaohsiung 804, Taiwan

来源：

MATERIALS CHARACTERIZATION | 2013年 / 80卷

关键词：

Metal matrix composites; Mechanical properties; Friction stir processing; MECHANICAL-PROPERTIES; MATRIX; MICROSTRUCTURE; DEFORMATION; AL3TI;

D O I：

10.1016/j.matchar.2013.03.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aluminum matrix composites reinforced with nanometer-sized Al2O3 particles were produced from Al-SiO2 powder mixture by using friction stir processing (FSP). In the composites, Al2O3 particles were produced in situ by oxide-aluminum displacement reactions. This approach combined the hot working nature of FSP and an exothermic reaction between Al and SiO2. The Al2O3 particles were formed at the Al/SiO2 interface, and dispersed in the aluminum matrix by the stirring action of the rotating tool during FSP. Microstructural examinations revealed the Al2O3 particles present mainly in the form of clusters of nano-sized (approximately 20 nm) particles, which were identified as alpha-Al2O3. Because of the fine dispersion of nano-sized particles in an ultrafine-grained aluminum matrix, the composites exhibit superior tensile strength and ductility. Quantitative phase analysis indicated that the extent of the Al-SiO2 reaction increased in conjunction with an increasing tool rotation rate and a decreasing tool traverse speed in FSP. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：1 / 8

页数：8

共 23 条

[1] Effect of friction stir processing (FSP) on microstructure and properties of Al-TiC in situ composite [J].

Bauri, Ranjit ;

Yadav, Devinder ;

Suhas, G. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (13-14) :4732-4739

[2] Effect of Processing Parameters on Microstructure and Mechanical Properties of an Al-Al11Ce3-Al2O3 In-Situ Composite Produced by Friction Stir Processing [J].

Chen, C. F. ;

Kao, P. W. ;

Chang, L. W. ;

Ho, N. J. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2010, 41A (02) :513-522

[3] Al-Al3Ti nanocomposites produced in situ by friction stir processing [J].

Hsu, C. J. ;

Chang, C. Y. ;

Kao, P. W. ;

Ho, N. J. ;

Chang, C. P. .

ACTA MATERIALIA, 2006, 54 (19) :5241-5249

[4] Ultrafine-grained Al-Al2Cu composite produced in situ by friction stir processing [J].

Hsu, CJ ;

Kao, PW ;

Ho, NJ .

SCRIPTA MATERIALIA, 2005, 53 (03) :341-345

[5] Al-Ni intermetallic composites produced in situ by friction stir processing [J].

Ke, Liming ;

Huang, Chunping ;

Xing, Li ;

Huang, Kehui .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 503 (02) :494-499

[6] Microstructure and mechanical properties of Al-Fe in situ nanocomposite produced by friction stir processing [J].

Lee, I. S. ;

Kao, P. W. ;

Ho, N. J. .

INTERMETALLICS, 2008, 16 (09) :1104-1108

[7] Particle-reinforced aluminum matrix composites produced from powder mixtures via friction stir processing [J].

Lee, I. S. ;

Hsu, C. J. ;

Chen, C. F. ;

Ho, N. J. ;

Kao, P. W. .

COMPOSITES SCIENCE AND TECHNOLOGY, 2011, 71 (05) :693-698

[8]

LLOYD DJ, 1994, INT MATER REV, V39, P1, DOI 10.1179/095066094790150982

[9] Friction stir processing technology: A review [J].

Ma, Z. Y. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2008, 39A (03) :642-658

[10]

Martin JW, 1976, STABILITY MICROSTRUC, P234

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