Toughening of commercial 85 wt.% Al2O3 by controlled heat treatments

Travitzky N (1985)


Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 1985

Journal

Publisher: Elsevier BV

Book Volume: 71

Pages Range: 65-70

DOI: 10.1016/0025-5416(85)90207-1

Abstract

In order to evaluate the relative importance of various heat treatment parameters on the mechanical behaviour of commercial 85 wt.% AlO (AD-85) it was decided to establish a three-dimensional matrix of test results based on three parameters varied within set limits. The three parameters chosen were (1) the solution treatment temperature which was varied from 1400 to 1600°C, (2) the stress relief (annealing) temperature which was varied from 750 to 900°C and (3) the precipitation temperature which was varied from 1050 to 1200°C. All other parameters (the time of exposure at temperature, the tile thickness and the cooling rate) were kept fixed. The transverse rupture strength σ and fracture toughness K were measured Fractographic and ceramographic analyses were performed on test specimens after fracture. X-ray diffraction analysis of specimens was performed after different heat treatments. The maximum values of σ and K were obtained for specimens that were rapidly cooled after solution treatment. Smooth fracture surfaces were observed for these specimens, compared with rough fracture surfaces for specimens showing low σ and K values. The highest values of σ and K observed are of the same order as for high performance ceramics. © 1985.

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How to cite

APA:

Travitzky, N. (1985). Toughening of commercial 85 wt.% Al2O3 by controlled heat treatments. Materials Science and Engineering, 71, 65-70. https://dx.doi.org/10.1016/0025-5416(85)90207-1

MLA:

Travitzky, Nahum. "Toughening of commercial 85 wt.% Al2O3 by controlled heat treatments." Materials Science and Engineering 71 (1985): 65-70.

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