Affordable Access

Publisher Website

Tensile properties and microstructures of Al composite reinforced with BN particles

Composites Part A Applied Science and Manufacturing
Publication Date
DOI: 10.1016/s1359-835x(02)00011-8
  • In Situ Reaction
  • A. Metal-Matrix Composites (Mmcs)
  • B. Mechanical Properties
  • B. Strength
  • E. Powder Processing


Abstract Al–4.5 wt% Mg alloys reinforced with and without BN were fabricated by pressureless infiltration method and then their tensile properties and microstructures were analyzed. Since the spontaneous infiltration of molten metal occurred at a temperature of 800 °C for 1 h under nitrogen atmosphere, it was possible to fabricate the Al composites reinforced with BN and control alloy without BN. A large increase in strength in the case of the control alloy is related to the in situ formation of AlN particles as well as grain size refinement. In the composite reinforced with BN, additional AlN was formed by the interfacial reaction of the BN and Al melt as well as AlN by the in situ reaction. In addition, the grain size in the composite reinforced with 7.5 vol% BN further decreased to about 4.0 μm and exhibited approximately 3.5 times reduction in the grain size of the commercial alloy. Consequently, a further strengthening in the composite resulted from both the BN artificially added and AlN formation (by the in situ reaction and interfacial reaction) and grain refinement.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Microstructures and mechanical properties of pure...

on Materials Science and Engineer... Jan 01, 2003

Microstructures and mechanical properties of Al-ba...

on Journal of Alloys and Compound... Jan 01, 2010

The structure and properties of PM composite mater...

on Journal of Materials Processin... Jan 01, 2006

Effects of sintering temperature of whisker prefor...

on Materials Science and Engineer... Jan 01, 2011
More articles like this..