Mechanical behaviour of polycrystalline BeO, Al2O3 and AlN at high pressure

Heard, H.C.; Cline, C.F.

doi:10.1007/bf00550614

Cited by 135 publications

(52 citation statements)

References 14 publications

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“…However, the shape of components that may be produced is typically somewhat limited to simple shapes; complex shapes require specially-designed dies [54]. Hot pressing of BeO typically results in an anisotropic microstructure, with preferential alignment of the elongated c-axis of acicular grains in a plane perpendicular to the hot pressing direction with random orientation within this plane [60,61].…”

Section: Berylliamentioning

confidence: 99%

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

et al. 2011

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The current review uses the material requirements of a new space propulsion device, the Variable Specific Impulse Magnetoplasma Rocket (VASIMR ® ) as a basis for presenting the temperature dependent properties of a range of dielectric ceramics, but data presented could be used in the engineering design of any ceramic component with complementary material requirements. A material is required for the gas containment tube (GCT) of VASIMR ® to allow it to operate at higher power levels. The GCT's operating conditions place severe constraints on the choice of material. A dielectric is required with a high thermal conductivity, low dielectric loss factor, and high thermal shock resistance. There is a lack of a representative set of temperature-dependent material property data for materials considered for this application and these are required for accurate thermo-structural modelling. This modelling would facilitate the selection of an optimum material for this component. The goal of this paper is to determine the best material property data values for use in the materials selection and design of such components. A review of both experimentally and theoretically-determined temperature-dependent & room temperature properties of several materials has been undertaken. Data extracted are presented by property. Properties reviewed are density, Young's, bulk and shear moduli, Poisson's ratio, tensile, flexural and compressive strength, thermal conductivity, specific heat capacity, thermal expansion coefficient and the factors affecting maximum service temperature. Materials reviewed are alumina, aluminium nitride, beryllia, fused quartz, sialon and silicon nitride.

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Section: Berylliamentioning

confidence: 99%

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

et al. 2011

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“…As exceptions, only a handful of ceramics show room-temperature plasticity via anomalous deformation processes, such as martensitic transformation [1,2], kink bands [3] and grain boundary sliding [4,7], or subjected to extreme loading conditions, such as shock [6,8], high pressure [9][10][11] and strain confinement [11][12][13]. Nevertheless, large dislocation plasticity is rarely seen in high strength ceramics during room-temperature uniaxial deformation [14].…”

Section: Introductionmentioning

confidence: 98%

Sample size induced brittle-to-ductile transition of single-crystal aluminum nitride

et al. 2015

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“…The theoretical prediction eqn (9) of failure strength vs lateral confinement is compared with the experimental observations in various ceramics. The experimental data in A1 2 0 3 is taken from Heard and Cline (1990), in AIN from Rosenberg et al (1991) as well as Chen and Ravichandran (1996) and in hotpressed (hp) and cold-pressed (cp) BeO from Heard and Cline (1990).…”

Section: Resultsmentioning

confidence: 99%

Proceedings of a Symposium on the Dynamic Deformation and Failure of Materials (Journal of the Mechanics and Physics of Solids. Volume 46, Number 10)

Ravichandran¹

2000

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reporting original research on the mechanics of solids. Emphasis is placed on the development of fundamental concepts of mechanics and novel applications of these concepts based on theoretical, experimental or computational approaches, drawing upon the various branches of engineering science and the allied areas within applied mathematics, materials science, structural engineering, applied physics and geophysics. The main purpose of the Journal is to foster scientific understanding of the processes of deformation and mechanical failure of all solid materials, both technological and natural, and the connections between these processes and their underlying physical mechanisms. In this sense, the content of the Journal should reflect the current state of the discipline in analysis, experimental observation and numerical simulation. In the interest of achieving this goal, authors are encouraged to consider the significance of their contributions for the field of mechanics and the implications of their results, in addition to describing the details of their work.© 1998 Elsevier Science Ltd. All rights reserved.This j ournal and the individual contributions contained in it are protected under copyright by Elsevier Science Ltd, and the following terms and conditions apply to their use: Photocopying Single photocopies of single articles may be made for personal use as allowed by national copyright laws. Permission of the publisher and payment of a fee is required for all other photocopying, including multiple or systematic copying, copying for advertising or promotional purposes, resale, and all forms of document delivery. Special rates are available for educational institutions that wish to make photocopies for non-profit educational classroom use. Derivative works Subscribers may reproduce tables of contents or prepare lists of articles including abstracts for internal circulation within their institutions. Permission of the publisher is required for resale or distribution outside the institution. Permission of the publisher is required for all other derivative works, including compilations and translations.Electronic storage or Usage Permission of the publisher is required to store or use electronically any material contained in this journal, including any article or part of an article. Contact the publisher at the address indicated. Except as outlined above, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of the publisher. Address permissions requests to: Elsevier Rights & Permissions Department, at the mail, fax and e-mail addresses noted above. NoticeNo responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the med...

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Mechanical behaviour of polycrystalline BeO, Al2O3 and AlN at high pressure

Cited by 135 publications

References 14 publications

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

A review of the processing, composition, and temperature-dependent mechanical and thermal properties of dielectric technical ceramics

Sample size induced brittle-to-ductile transition of single-crystal aluminum nitride

Proceedings of a Symposium on the Dynamic Deformation and Failure of Materials (Journal of the Mechanics and Physics of Solids. Volume 46, Number 10)

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