Thermostability of Monolithic and Reinforced Al–Fe–V–Si Materials

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Abstract:

Al–Fe–V–Si alloys reinforced with SiC particles were prepared by multi-layer spray deposition technique. Both microstructures and mechanical properties including hardness and tensile properties development during hot exposure process of Al–8.5Fe–1.3V–1.7Si, Al–8.5Fe–1.3V–1.7Si/15 vol% SiCP and Al–10.0Fe–1.3V–2Si/15 vol% SiCP were investigated. The experimental results showed that an amorphous interface of about 3 nm in thickness formed between SiC particles and the matrix. SiC particles injected silicon into the matrix; thus an elevated silicon concentration was found around α-Al12(Fe, V)3Si dispersoids, which subsequently inhibited the coarsening and decomposition of α-Al12(Fe, V)3Si dispersoids and enhanced the thermostability of the alloy matrix. Moreover, the thermostability of microstructure and mechanical properties of Al–10.0Fe–1.3V–2Si/15 vol% SiCP are of higher quality than those of Al–8.5Fe–1.3V–1.7Si/15 vol% SiCP.

Keywords: ANNEALING; HEAT RESISTANT ALUMINUM ALLOY; METAL–MATRIX COMPOSITES; THERMOSTABILITY

Document Type: Research Article

DOI: http://dx.doi.org/10.1163/156855109X434775

Affiliations: 1: College of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China 2: Department of Human Resources, Huaihai Institute of Technology, Lianyungang 222005, People's Republic of China;, Email: ant210@sina.com 3: Department of Mechanical Engineering, Zhangjiajie Institute of Aviation Industry vocational, Zhangjiajie, Hunan 427000, People's Republic of China 4: College of Materials Science and Engineering, Hunan University, Changsha 410082, People's Republic of China

Publication date: October 1, 2009

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