Chapter 57. Mechanical Properties of Nanocrystalline MgAl2O4and its Composites

  1. Don Bray
  1. S. Bhaduri1,
  2. S. B. Bhaduri1 and
  3. C. H. Henager Jr.2

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch57

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Bhaduri, S., Bhaduri, S. B. and Henager, C. H. (1998) Mechanical Properties of Nanocrystalline MgAl2O4and its Composites, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch57

Author Information

  1. 1

    University of Idaho MOSCOW, ID 83844–3024

  2. 2

    U.S.D.0.E.-Basic Energy Science Division Germantown, MD 20874–1290

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

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Keywords:

  • electrostatic;
  • diameter;
  • atomizing;
  • durability;
  • abrasion

Summary

Magnesium aluminate spinel (Mg>Al2O4) is known for its ductility at high temperatures. By retaining nanocrystalline grain size after densification, further enhancement ductility is expected. In this paper, nanocrystalline MgAl2O4 and composites were densified by hot isostatic pressing (HIPing). The objective of the paper is to investigate the room temperature as well as high temperature mechanical properties of dense nanocrystalline MgAl2O4 and its composites and compare the data with the existing literature for coarse grained materials. The hardness values range between 2.89–7.79 GPa and fracture toughness of MgAl2O4 and MgAl2O4-Al2O3 nanocomposites are between 2.5–5.82 MPa.m1/2. Hot hardness results showed a reduction in hardness at 1000°C.