Chromide coatings, articles coated with chromide coatings, and processes for forming chromide coatings
US-2016184890-A1 · Jun 30, 2016 · US
Aluminum-chromium diffusion coating
US12344926B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12344926-B2 |
| Application number | US-202217706050-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2022 |
| Priority date | Mar 28, 2017 |
| Publication date | Jul 1, 2025 |
| Grant date | Jul 1, 2025 |
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Abstract
Official abstract text for this publication.
A process includes applying a slurry to a surface of a metallic article to produce a slurry film on the surface. The slurry is composed of a liquid carrier, chromium and aluminum, and an agent that is reactive with the chromium and aluminum to form intermediary compounds. The article and slurry film are then thermally treated at an activation temperature at which the agent reacts with the chromium and aluminum to form the intermediary compounds. The intermediary compounds deposit the chromium and aluminum on the surface. The thermal treating also diffuses the chromium and aluminum into a sub-surface region of the article such that the sub-surface region becomes enriched with chromium and aluminum.
First claim
Opening claim text (preview).
What is claimed is: 1. A slurry for use in a process to coat an article, the slurry comprising: a liquid carrier; chromium-aluminum alloy particles that have a composition, by weight, of 5% to 10% aluminum and 95% to 90% chromium; and an agent that is reactive at an activation temperature with the chromium and aluminum to form intermediary compounds. 2. The slurry as recited in claim 1 , wherein the agent is a halide. 3. The slurry as recited in claim 2 , wherein the halide is selected from the group consisting of ammonium chloride, chromium chloride, ammonium fluoride, and combinations thereof. 4. The slurry as recited in claim 3 , further comprising an additive that has yttrium. 5. The slurry as recited in claim 3 , further comprising an additive that has hafnium. 6. The slurry as recited in claim 3 , further comprising an additive selected from the group consisting of yttrium, hafnium, silica, mullite, alumina, and mixtures thereof.
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Frequently asked questions
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- What does patent US12344926B2 cover?
- A process includes applying a slurry to a surface of a metallic article to produce a slurry film on the surface. The slurry is composed of a liquid carrier, chromium and aluminum, and an agent that is reactive with the chromium and aluminum to form intermediary compounds. The article and slurry film are then thermally treated at an activation temperature at which the agent reacts with the chrom…
- Who is the assignee on this patent?
- Raytheon Tech Corp, Rtx Corp
- What technology area does this patent fall under?
- Primary CPC classification C23C10/30. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 01 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).