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Title: Low temperature joining of ceramic composites

Abstract

A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or ceramic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 C to form a strong and tough bond joint between the materials. The bond joint produced is characterized by a composite joint microstructure having relatively soft, compliant aluminum bearing particulate regions dispersed in a ceramic matrix. 3 figs.

Inventors:
; ; ; ;
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6175114
Patent Number(s):
5922628
Application Number:
PPN: US 9-028591
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States)
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Patent File Date: 23 Feb 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BONDING; CERAMICS; COMPOSITE MATERIALS; HEATING; JOINTS; MECHANICAL PROPERTIES; MICROSTRUCTURE; SILICON CARBIDES; TEMPERATURE RANGE 1000-4000 K; CARBIDES; CARBON COMPOUNDS; FABRICATION; JOINING; MATERIALS; SILICON COMPOUNDS; TEMPERATURE RANGE; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Barton, T J, Anderson, I E, Ijadi-Maghsoodi, S, Nosrati, M, and Unal, O. Low temperature joining of ceramic composites. United States: N. p., 1999. Web.
Barton, T J, Anderson, I E, Ijadi-Maghsoodi, S, Nosrati, M, & Unal, O. Low temperature joining of ceramic composites. United States.
Barton, T J, Anderson, I E, Ijadi-Maghsoodi, S, Nosrati, M, and Unal, O. Tue . "Low temperature joining of ceramic composites". United States.
@article{osti_6175114,
title = {Low temperature joining of ceramic composites},
author = {Barton, T J and Anderson, I E and Ijadi-Maghsoodi, S and Nosrati, M and Unal, O},
abstractNote = {A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or ceramic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 C to form a strong and tough bond joint between the materials. The bond joint produced is characterized by a composite joint microstructure having relatively soft, compliant aluminum bearing particulate regions dispersed in a ceramic matrix. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {7}
}