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Title: Boron-carbide-aluminum and boron-carbide-reactive metal cermets. [B/sub 4/C-Al]

Abstract

Hard, tough, lighweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidated step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modules of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi..sqrt..in. These composites and methods can be used to form a variety of structural elements.

Inventors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
5587257
Application Number:
ON: DE86013711
Assignee:
Dept. of Energy LLNL; ERA-11-004846; EDB-86-136392
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; PRODUCTION; BORON CARBIDES; CERMETS; COMPOSITE MATERIALS; FRACTURE PROPERTIES; WETTABILITY; ALLOYS; BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; MATERIALS; MECHANICAL PROPERTIES; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Halverson, D.C., Pyzik, A.J., and Aksay, I.A. Boron-carbide-aluminum and boron-carbide-reactive metal cermets. [B/sub 4/C-Al]. United States: N. p., 1985. Web.
Halverson, D.C., Pyzik, A.J., & Aksay, I.A. Boron-carbide-aluminum and boron-carbide-reactive metal cermets. [B/sub 4/C-Al]. United States.
Halverson, D.C., Pyzik, A.J., and Aksay, I.A. Mon . "Boron-carbide-aluminum and boron-carbide-reactive metal cermets. [B/sub 4/C-Al]". United States.
@article{osti_5587257,
title = {Boron-carbide-aluminum and boron-carbide-reactive metal cermets. [B/sub 4/C-Al]},
author = {Halverson, D.C. and Pyzik, A.J. and Aksay, I.A.},
abstractNote = {Hard, tough, lighweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidated step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modules of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi..sqrt..in. These composites and methods can be used to form a variety of structural elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {5}
}