MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Mechanical Properties of TiB2–Al3Ti and TiB2–(Al,Ni)3Ti Composites
Masashi YoshidaTakafumi Yumitate
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2012 Volume 53 Issue 11 Pages 1933-1937

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Abstract

Composites of TiB2-tetragonal Al3Ti and TiB2-cubic (Al,Ni)3Ti have been fabricated using spark plasma sintering method at the temperature between 1173 and 1573 K. When TiB2–(Al,Ni)3Ti specimens were sintered between 1273 and 1373 K, (Al,Ni)3Ti filled in space between TiB2 grains and dense samples were obtained. On the other hand, when TiB2–(Al,Ni)3Ti specimens were sintered at above 1473 K, (Al,Ni)3Ti evaporated and monolithic TiB2 were obtained. A similar results have been obtained for the TiB2–Al3Ti composites. The highest bending strength of TiB2–(Al,Ni)3Ti specimens were 660 MPa obtained for TiB2–30 mass%(Al,Ni)3Ti sintered at 1373 K. The highest bending strength of TiB2–Al3Ti composites were 610 MPa obtained for TiB2–30 mass%Al3Ti sintered at 1473 K. The Vickers hardness of TiB2–(Al,Ni)3Ti composites increased as the sintering temperature increased and the maximum value of 2100 Hv were obtained by the sintering at 1573 K.

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© 2012 The Japan Institute of Metals and Materials
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