Combustion chamber inner wall protective coating in high-temperature friction environment and preparation method thereof
A technology of protective coating and combustion chamber, applied in combustion methods, combustion chambers, combustion equipment, etc., can solve the problems of high porosity and low bonding strength
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0032] The present invention also provides a method for preparing a protective coating on the inner wall of a combustion chamber in a high-temperature friction environment, the thickness of the protective coating is 1 to 3 mm, such as Figure 5 Shown, described preparation method comprises:
[0033] Step S1, obtaining a uniformly mixed composite powder;
[0034] This step specifically adopts the following method: the CeF 3 Powder and LaF 3 The powder is mixed according to the mass ratio of 1:1 to obtain fluoride powder, and then 85wt% cermet powder, 5wt% ~ 10wt% WS 2 The powder and 5wt%-10wt% fluoride powder are mixed, and through the process of high-energy ball milling and mesh sieving, the composite powder with high bulk density, good fluidity and spherical or near-spherical structure is prepared.
[0035] Step S2, pretreating the surface of the substrate;
[0036] This step specifically adopts the following method: the substrate is cleaned, and the surface is sandblaste...
Embodiment 1
[0044] Step S1, obtaining a uniformly mixed composite powder;
[0045] This step specifically adopts the following method: the CeF 3 Powder and LaF 3 The powders are mixed according to the mass ratio of 1:1 to obtain fluoride powder, and then 85wt% cermet powder, 7.5wt% WS 2 The powder and 7.5wt% fluoride powder are mixed, and the mixed multi-phase cermet powder with high bulk density, good fluidity and spherical or nearly spherical structure is prepared through high-energy ball milling and mesh sieving.
[0046] Step S2, pretreating the surface of the substrate;
[0047] This step specifically adopts the following method: the substrate is cleaned, and the surface is sandblasted with 60-mesh brown corundum sand to roughen the surface and improve the bonding strength between the coating and the substrate.
[0048] In other embodiments, the surface roughening of the base material may also use threading, knurling, electric roughening and the like.
[0049] Step S3, preparing ...
Embodiment 2
[0056] CeF 3 Powder and LaF 3 The powders are mixed according to the mass ratio of 1:1 to obtain fluoride powder, and then 85wt% cermet powder, 5wt% WS 2 Powder and 10wt% fluoride powder were mixed, and other preparation conditions were exactly the same as those in Example 1.
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More