In-situ generated aluminum nitride-silicon carbide solid solution multiphase ceramic and preparation method thereof
A technology of in-situ generation and composite ceramics, which is applied in the field of aluminum nitride-silicon carbide solid solution composite ceramics, can solve the problem of difficult control of phase dispersion and uniformity in composite ceramics, change of material chemical composition and material properties Difficult regulation and other issues, to achieve excellent oxidation resistance and hydration resistance, uniform and compact structure, and improve oxidation resistance and hydration resistance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0020] The binder used in the preparation method provided by the present invention is not limited, as long as it can be uniformly mixed with the powder material and can be prepared into a block sample, it can be applicable. The present invention will be further described and illustrated below in conjunction with specific embodiments. It should be understood that the following specific examples are only used to illustrate the present invention rather than limit its protection scope.
[0021] In this specific implementation manner:
[0022] The Al 4 SiC 4 Powder purity ≥ 98.0wt%, particle size ≤ 150μm;
[0023] The purity of the nitrogen is ≥98.5%;
[0024] The binder is more than one of phenolic resin, epoxy resin, acrylic acid, silica sol and aluminum dihydrogen phosphate.
Embodiment 1
[0026] An in-situ formed aluminum nitride-silicon carbide solid solution composite ceramic and a preparation method thereof.
[0027] Step 1, according to Al 4 SiC 4 The mass ratio of powder: binder is 100:3, and the Al 4 SiC 4 The powder is mixed with the binder to obtain the mixture;
[0028] Step 2. Prepress the mixture under the condition of 5MPa, then isostatically press it under the condition of 200MPa, then place it in a constant temperature drying oven, and dry it at 110°C for 1 hour to obtain the prefabricated body;
[0029] Step 3: Put the prefabricated body into a graphite crucible, then place the graphite crucible in a hot-press furnace, heat it from room temperature to 1100°C at a rate of 10°C / min under vacuum ≤ 0.1mbar, and keep it warm Charge N under condition 2 To 2MPa, reheat to 1900°C at a rate of 5°C / min under pressure holding conditions, hold pressure for 2 hours, and cool naturally to room temperature to obtain in-situ aluminum nitride-silicon carbide...
Embodiment 2
[0032] An in-situ formed aluminum nitride-silicon carbide solid solution composite ceramic and a preparation method thereof.
[0033] Step 1, according to Al 4 SiC 4 The mass ratio of powder: binder is 100:2, and the Al 4 SiC 4 The powder is mixed with the binder to obtain the mixture;
[0034] Step 2: Prepress the mixture under the condition of 20MPa, then isostatically press it under the condition of 240MPa, then place it in a constant temperature drying oven, and dry it at 110°C for 3 hours to obtain the prefabricated body;
[0035] Step 3: Put the prefabricated body into a graphite crucible, then place the graphite crucible in a hot-press furnace, heat it from room temperature to 1200°C at a rate of 6°C / min under vacuum ≤ 0.1mbar, and keep it warm Charge N under condition 2To 8MPa, reheat to 2000°C at a rate of 2°C / min under pressure holding conditions, hold pressure for 3h, and cool naturally to room temperature to obtain in-situ formed aluminum nitride-silicon carbi...
PUM
| Property | Measurement | Unit |
|---|---|---|
| bending strength | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More