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Title: AlN matrix composites fabricated via an infiltration and reaction approach

Abstract

Novel AlN-based ceramic matrix composites were produced using a two-step infiltration and reaction process. Molten Al alloy was infiltrated without pressure into preforms containing Si[sub 3]N[sub 4] particles (mixed [alpha] and [beta] phases). The resultant composites were heat-treated, causing hard phases (AlN and Si) to form by reaction of the soft Al with Si[sub 3]N[sub 4]. The ceramic content of the final composites was higher than that of the original preform due to volume changes that occurred during the reaction heat treatment. Initial characterization of mechanical properties demonstrated that the composites had hardnesses, Young's moduli, and compressive strengths that compared favorably with traditionally processed AlN. Flexural strength measurements above the melting point of Si indicated that the composites possessed an interconnected skeleton of ceramic.

Authors:
; ;  [1]
  1. Lanxide Corp., Newark, DE (United States)
Publication Date:
OSTI Identifier:
7166082
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society; (United States)
Additional Journal Information:
Journal Volume: 77:7; Journal ID: ISSN 0002-7820
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM NITRIDES; FABRICATION; MECHANICAL PROPERTIES; COMPOSITE MATERIALS; SILICON NITRIDES; ALUMINIUM COMPOUNDS; MATERIALS; NITRIDES; NITROGEN COMPOUNDS; PNICTIDES; SILICON COMPOUNDS; 360601* - Other Materials- Preparation & Manufacture; 360603 - Materials- Properties

Citation Formats

Aghajanian, M K, Biel, J P, and Smith, R G. AlN matrix composites fabricated via an infiltration and reaction approach. United States: N. p., 1994. Web. doi:10.1111/j.1151-2916.1994.tb07071.x.
Aghajanian, M K, Biel, J P, & Smith, R G. AlN matrix composites fabricated via an infiltration and reaction approach. United States. https://doi.org/10.1111/j.1151-2916.1994.tb07071.x
Aghajanian, M K, Biel, J P, and Smith, R G. 1994. "AlN matrix composites fabricated via an infiltration and reaction approach". United States. https://doi.org/10.1111/j.1151-2916.1994.tb07071.x.
@article{osti_7166082,
title = {AlN matrix composites fabricated via an infiltration and reaction approach},
author = {Aghajanian, M K and Biel, J P and Smith, R G},
abstractNote = {Novel AlN-based ceramic matrix composites were produced using a two-step infiltration and reaction process. Molten Al alloy was infiltrated without pressure into preforms containing Si[sub 3]N[sub 4] particles (mixed [alpha] and [beta] phases). The resultant composites were heat-treated, causing hard phases (AlN and Si) to form by reaction of the soft Al with Si[sub 3]N[sub 4]. The ceramic content of the final composites was higher than that of the original preform due to volume changes that occurred during the reaction heat treatment. Initial characterization of mechanical properties demonstrated that the composites had hardnesses, Young's moduli, and compressive strengths that compared favorably with traditionally processed AlN. Flexural strength measurements above the melting point of Si indicated that the composites possessed an interconnected skeleton of ceramic.},
doi = {10.1111/j.1151-2916.1994.tb07071.x},
url = {https://www.osti.gov/biblio/7166082}, journal = {Journal of the American Ceramic Society; (United States)},
issn = {0002-7820},
number = ,
volume = 77:7,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 1994},
month = {Fri Jul 01 00:00:00 EDT 1994}
}