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Title: Structural alloy with a protective coating containing silicon or silicon-oxide

Abstract

An iron-based alloy containing chromium and optionally, nickel. The alloy has a surface barrier of silicon or silicon plus oxygen which converts at high temperature to a protective silicon compound. The alloy can be used in oxygen-sulfur mixed gases at temperatures up to about 1100.degree. C.

Inventors:
 [1]
  1. (Naperville, IL)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
869676
Patent Number(s):
US 5376458
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
structural; alloy; protective; coating; containing; silicon; silicon-oxide; iron-based; chromium; optionally; nickel; surface; barrier; plus; oxygen; converts; temperature; compound; oxygen-sulfur; mixed; gases; temperatures; 1100; degree; mixed gas; silicon compound; protective coating; alloy containing; mixed gases; based alloy; oxygen-sulfur mixed; surface barrier; containing silicon; coating containing; containing chromium; iron-based alloy; /428/

Citation Formats

Natesan, Ken. Structural alloy with a protective coating containing silicon or silicon-oxide. United States: N. p., 1994. Web.
Natesan, Ken. Structural alloy with a protective coating containing silicon or silicon-oxide. United States.
Natesan, Ken. Sat . "Structural alloy with a protective coating containing silicon or silicon-oxide". United States. doi:. https://www.osti.gov/servlets/purl/869676.
@article{osti_869676,
title = {Structural alloy with a protective coating containing silicon or silicon-oxide},
author = {Natesan, Ken},
abstractNote = {An iron-based alloy containing chromium and optionally, nickel. The alloy has a surface barrier of silicon or silicon plus oxygen which converts at high temperature to a protective silicon compound. The alloy can be used in oxygen-sulfur mixed gases at temperatures up to about 1100.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}

Patent:

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  • An iron-based alloy is described containing chromium and optionally, nickel. The alloy has a surface barrier of silicon or silicon plus oxygen which converts at high temperature to a protective silicon compound. The alloy can be used in oxygen-sulfur mixed gases at temperatures up to about 1100 C. 8 figures.
  • This invention is comprised of an iron-based alloy containing chromium and optionally, nickel. The alloy has a surface barrier of silicon or silicon plus oxygen which converts at high temperature to a protective silicon compound. The alloy can be used in oxygen-sulfur mixed gases at temperatures up to about 1100{degrees}C.
  • Ceramic composites formed of an alumina matrix reinforced with silicon carbide whiskers homogenously dispersed therein are provided with a protective coating for preventing fracture strength degradation of the composite by oxidation during exposure to high temperatures in oxygen-containing atmospheres. The coating prevents oxidation of the silicon carbide whiskers within the matrix by sealing off the exterior of the matrix so as to prevent oxygen transport into the interior of the matrix. The coating is formed of mullite or mullite plus silicon oxide and alumina and is formed in place by heating the composite in air to a temperature greater thanmore » 1200.degree. C. This coating is less than about 100 microns thick and adequately protects the underlying composite from fracture strength degradation due to oxidation.« less
  • A polycrystalline beta-silicon carbide film or coating and method for forming same on components, such as the top of solar cells, to act as an extremely hard protective surface, and as an anti-reflective coating. This is achieved by DC magnetron co-sputtering of amorphous silicon and carbon to form a SiC thin film onto a surface, such as a solar cell. The thin film is then irradiated by a pulsed energy source, such as an excimer laser, to synthesize the poly- or .mu.c-SiC film on the surface and produce .beta.--SiC. While the method of this invention has primary application in solarmore » cell manufacturing, it has application wherever there is a requirement for an extremely hard surface.« less