Metallurgical and Materials Transactions A

, Volume 43, Issue 1, pp 281–293

Interfacial Microstructure in a B4C/Al Composite Fabricated by Pressureless Infiltration

  • Zhiping Luo
  • Yinggang Song
  • Shaoqing Zhang
  • Dean J. Miller
Article
  • 416 Downloads

Abstract

In this work, B4C particulate-reinforced Al composite was fabricated by a pressureless infiltration technique, and its interfacial microstructure was studied in detail by X-ray diffraction as well as by scanning and transmission electron microscopy. The B4C phase was unstable in Al melt during the infiltration process, forming AlB10-type AlB24C4 or Al2.1B51C8 as a major reactant phase. The Al matrix was large grains (over 10 μm), which had no definite orientation relationships (ORs) with the randomly orientated B4C or its reactant particles, except for possible nucleation sites with \( \{ 011\}_{{{\text{B}}_{4} {\text{C}}}} \) almost parallel to {111}Al at a deviation angle of 1.5 deg. Both B4C–Al and reactant–Al interfaces are semicoherent and free of other phases. A comparison was made with the SiC/Al composite fabricated similarly by the pressureless infiltration. It was suggested that the lack of ORs between the Al matrix and reinforced particles, except for possible nucleation sites, is the common feature of the composites prepared by the infiltration method.

Supplementary material

11661_2011_817_MOESM1_ESM.pdf (1.5 mb)
Supplementary material 1 (PDF 1503 kb)

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2011

Authors and Affiliations

  • Zhiping Luo
    • 1
  • Yinggang Song
    • 2
  • Shaoqing Zhang
    • 2
  • Dean J. Miller
    • 3
  1. 1.Microscopy and Imaging Center and the Materials Science and Engineering ProgramTexas A&M UniversityCollege StationUSA
  2. 2.Beijing Institute of Aeronautical MaterialsBeijingP.R. China
  3. 3.Electron Microscopy Center, Materials Science DivisionArgonne National LaboratoryArgonneUSA

Personalised recommendations