Patterned abradable coating and methods for the manufacture thereof
US-2016236995-A1 · Aug 18, 2016 · US
Abradable coating having variable densities
US10870152B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10870152-B2 |
| Application number | US-201616062224-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2016 |
| Priority date | Dec 14, 2015 |
| Publication date | Dec 22, 2020 |
| Grant date | Dec 22, 2020 |
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- Title
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Abstract
Official abstract text for this publication.
A method of fabricating an abradable coating of varying density, and such an abradable coating of varying density. According to the invention, the method comprises the following steps: providing a substrate (32) having a first portion with its surface situated at a first level (A), and a second portion with its surface situated at a second level (B) different from the first level; depositing a precursor material on the first and second portions of the substrate (32); compressing the precursor material between the substrate and a bearing surface; and sintering the precursor material as compressed in this way in order to obtain an abradable coating (36) having a first portion (36a) on the first portion of the substrate, and possessing a first density, and a second portion (36b) on the second portion of the substrate, and possessing a second density distinct from the first.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fabrication method for an abradable coating of varying density, the method comprising the following steps: providing a substrate having a first portion with its surface situated at a first level, and a second portion with its surface situated at a second level different from the first level; depositing a precursor material on the first and second portions of the substrate; compressing the precursor material between the substrate and a bearing surface; and sintering the precursor material as compressed in this way in order to obtain an abradable coating having a first portion on the first portion of the substrate, and possessing a first density, and a second portion on the second portion of the substrate, and possessing a second density distinct from the first. 2. A method according to claim 1 , wherein the second portion of the substrate is obtained by machining at least one groove in a blank of the substrate. 3. A method according to claim 1 , wherein the bearing surface is continuous and rectilinear at least in a direction extending transversely relative to the first and second portions of the substrate. 4. A method according to claim 1 , wherein the first portion of the abradable coating possesses final porosity of less than 15%. 5. A method according to claim 1 , wherein the second portion of the abradable coating possesses final porosity greater than 20%. 6. A method according to claim 1 , further comprising, before the step of depositing the precursor material on the first and second portions of the substrate, a step of forming by sintering a backing layer on the second portion of the substrate, the final porosity of the backing layer being less than 15%. 7. A method according to claim 1 , further comprising, after the step of sintering the precursor material, a step of forming by sintering a surface layer on at least a portion of the abradable coating, the surface layer having final porosity of less than 15%. 8. A method according to claim 1 , wherein the substrate is a ring sector. 9. A method according to claim 1 , wherein the substrate possesses a longitudinal channel between two longitudinal shoulders, the shoulders forming part of the first portion of the substrate, and the bottom of the channel forming part of the second portion of the substrate.
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Classifications
Shroud seal segments · CPC title
by application of heat or pressure and heat (C23C24/04 takes precedence) · CPC title
with erodable or abradable material (blades having cutting or grinding tips F01D5/20) · CPC title
of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title
Efficient propulsion technologies, e.g. for aircraft · CPC title
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- What does patent US10870152B2 cover?
- A method of fabricating an abradable coating of varying density, and such an abradable coating of varying density. According to the invention, the method comprises the following steps: providing a substrate (32) having a first portion with its surface situated at a first level (A), and a second portion with its surface situated at a second level (B) different from the first level; depositing a …
- Who is the assignee on this patent?
- Safran Aircraft Engines, Centre Nat Rech Scient, Univ Toulouse 3 Paul Sabatier
- What technology area does this patent fall under?
- Primary CPC classification B22F7/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 22 2020 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).