自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 9    September 2020

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Preparation and characterization of different surface modified SiCp reinforced Al-matrix composites
Lü Pin-hui(吕品回), WANG Xiao-feng(王小锋), DONG Cui-ge(董翠鸽), PENG Chao-qun(彭超群), WANG Ri-chu(王日初)

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:The effects of SiCp surface modifications (Cu coating, Ni coating and Ni/Cu coating) on the microstructures and mechanical properties of Al matrix composites were investigated. Surface modification of SiC particles with Cu, Ni and Cu/Ni, respectively, was carried out by electroless plating method. SiCp/Al composites were prepared by hot pressed sintering followed by hot extrusion. The results show that the surface modification of SiC particles plays an effective role, which is relative to the type of surface coating, and the interfacial bonding become stronger in the following order: untreated SiCp<Ni(Cu)-coated SiCp<Ni/Cu-coated SiCp. The Ni/Cu-coated SiCp/Al composites exhibit the best comprehensive mechanical properties, with ultimate tensile strength (σUTS) and fracture strain (εf) of 389 MPa and 6.3%, respectively. Compared with that of untreated-SiCp/Al composites, the σUTS and εf are enhanced by 19.3% and 57.5%.

 

Key words: SiCp/Al composite; surface modification; electroless plating; mechanical properties; interfacial bonding

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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