ReCr alloy coating for diffusion barrier
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United States of America Patent
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Jun 13, 2006
Grant Date -
Feb 10, 2005
app pub date -
Sep 13, 2002
filing date -
Oct 31, 2001
priority date (Note) -
Expired
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Abstract
Disclosed is a ReCr alloy coating for diffusion barrier formed on a substrate, such as a high-temperature equipment member, which comprises an atomic composition of 50% to less than 90% Re, with the remainder consisting essentially of Cr except for inevitable impurities. Even if the alloy coating for diffusion barrier includes a diffusion layer containing at least one of the group consisting of Al, Si and Cr, a desired alloy composition of the alloy coating for diffusion barrier can be assured by a surface coating process and diffused components from the substrate while substantially preventing the diffusion of the elements of the diffusion layer during a homogenizing heat treatment. The alloy coating for diffusion barrier may include a Re-containing-alloy stress relief layer inserted between the film and the substrate. The ReCr--Ni alloy coating can suppress the deterioration of the substrate and the coating layer due to the reaction therebetween to provide an extended life span of the equipment member.
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