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OAJRC Material Science

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Article Open Access http://dx.doi.org/10.26855/oajrcms.2024.06.002

Microstructure and Mechanical Properties of Multi-interface Tungsten Fibre/Aluminium Alloy Composites Prepared by Spark Plasma Sintering

Linhui Zhang1,2,*, Yonghong Xu1,2, Binnian Zhong1,2

1Qinghai Provincial Key Laboratory of New Light Alloys, Xining, Qinghai, China.

2Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining, Qinghai, China.

*Corresponding author:Linhui Zhang

Published: July 16,2024

Abstract

There are hidden dangers in the use of stainless steel and fiber cement-based composite materials as the materials of disposal tanks, because of the accident of several nuclear leakage events in the world. The titanium alloy, nickel alloy and copper alloy also cannot guarantee the safety of nuclear waste due to the electrochemical corrosion at the weld, acid corrosion and chloride ion corrosion. Aluminum alloy was identified as a candidate material in the nuclear safety field by researchers as early as the 1980s due to its small specific absorption section, corrosion resistance and low price. However, the strength and density of Al alloy need to be improved for the materials used in disposal tanks. To enhance the strength and density of Aluminum alloy, tungsten fibre reinforced 7075 Al alloy composites with different content of tungsten fibre were produced by spark plasma sintering method. The mass percent of tungsten fibre in the composites are 5%, 10%, 15%, and 20%, respectively. Accordingly, the volume ratios of tungsten fibre are 0%, 5.11%, 10.19%, 15.27%, and 20.33%. The results show that all the composites have ideal interfacial bonding. The relative density of 5% tungsten fibre/7075 Aluminum alloy composite is as high as 98.83%. The distribution of tungsten fibre is reasonably more uniform with the increase in tungsten fibre content. Tensile tests indicate that the 10% tungsten fibre/7075 Aluminum alloy composite exhibits the largest strength, about 250 MPa. It is 72.4% higher than that of pure 7075 Al, which can be ascribed to the enhanced behavior of tungsten fibre. The hardness of the matrix was only between 50 and 60 HV, even smaller than that of fibre (about 1100 HV) and interface (1400 HV).

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How to cite this paper

Microstructure and Mechanical Properties of Multi-interface Tungsten Fibre/Aluminium Alloy Composites Prepared by Spark Plasma Sintering

How to cite this paper: Linhui Zhang, Yonghong Xu, Binnian Zhong. (2024) Microstructure and Mechanical Properties of Multi-interface Tungsten Fibre/Aluminium Alloy Composites Prepared by Spark Plasma Sintering. OAJRC Material Science6(1), 12-18.

DOI: http://dx.doi.org/10.26855/oajrcms.2024.06.002