发明名称 |
Stabilized two-phase-glass diffusion barrier |
摘要 |
An article with a corrosion-resistant diffusion barrier is provided to resist the attack of corrosion agents, during service at high temperature (>600 DEG C.). More specifically, a diffusion barrier containing a stabilized two-phase glass is provided. The stabilized two-phase glass comprises glass-forming oxides, other oxides with low cation coordination numbers and stabilizing agents wherein the glass-forming oxides block ionic transport by virtue of their network formation on the atomic scale and the stabilizing agents improve the stability of the diffusion barrier and compatibility with the substrate. The diffusion barrier covers some portion of the substrate that is optionally augmented by a base layer or a sealant layer. Being impervious and having low-solubility in corrosive environments, the diffusion barrier stops corrosive agents from reaching the substrate. When applied over aluminide coatings, it effectively improves the potency of the aluminides and prevents their rapid dissolution into the corrosive environment. The diffusion barrier can be applied by a process that evenly coats intricate geometries and does not harm substrate properties.
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申请公布号 |
US6071622(A) |
申请公布日期 |
2000.06.06 |
申请号 |
US19980183181 |
申请日期 |
1998.10.30 |
申请人 |
BEESABATHINA, DURGA PRASAD;KALVALA, PRASAD RAO;WIEDEMANN, KARL ERIK |
发明人 |
BEESABATHINA, DURGA PRASAD;KALVALA, PRASAD RAO;WIEDEMANN, KARL ERIK |
分类号 |
C23C18/12;C23C28/00;(IPC1-7):B32B9/00 |
主分类号 |
C23C18/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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