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Title: Silicon-nitride and metal composite

Abstract

A composite and a method for bonding the composite. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MoSi.sub.2 indirectly bonding the composite together. The method includes contacting the layer of MoSi.sub.2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400.degree. C.; and, simultaneously with the heating, compressing the layer such that the contacting is with a pressure of at least 30 MPa. This composite overcomes useful life problems in the fabrication of parts for a helical expander for use in power generation.

Inventors:
 [1];  [2]
  1. Livermore, CA
  2. Urbana, IL
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864025
Patent Number(s):
4293619
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
silicon-nitride; metal; composite; method; bonding; ceramic; portion; silicon; nitride; refractory; layer; mosi; indirectly; contacting; surface; heating; temperature; below; 1400; degree; simultaneously; compressing; pressure; 30; mpa; overcomes; useful; life; fabrication; helical; expander; power; generation; useful life; ceramic portion; temperature below; refractory metal; silicon nitride; power generation; metal composite; metal portion; /428/257/416/419/

Citation Formats

Landingham, Richard L, and Huffsmith, Sarah A. Silicon-nitride and metal composite. United States: N. p., 1981. Web.
Landingham, Richard L, & Huffsmith, Sarah A. Silicon-nitride and metal composite. United States.
Landingham, Richard L, and Huffsmith, Sarah A. Thu . "Silicon-nitride and metal composite". United States. https://www.osti.gov/servlets/purl/864025.
@article{osti_864025,
title = {Silicon-nitride and metal composite},
author = {Landingham, Richard L and Huffsmith, Sarah A},
abstractNote = {A composite and a method for bonding the composite. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MoSi.sub.2 indirectly bonding the composite together. The method includes contacting the layer of MoSi.sub.2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400.degree. C.; and, simultaneously with the heating, compressing the layer such that the contacting is with a pressure of at least 30 MPa. This composite overcomes useful life problems in the fabrication of parts for a helical expander for use in power generation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}