Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic

A technology of high-temperature ceramics, zrb2-zrc, applied in the field of ceramic materials, can solve problems such as restrictions on popularization and application, and achieve the effects of lower process temperature, low cost, and low preparation temperature

Inactive Publication Date: 2011-08-31
NAT UNIV OF DEFENSE TECH
View PDF2 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of the near-net-shape components of the reaction infiltration method, it has attracted widespread attention in recent years. There are reports in foreign literature that pure metal zirconium and 4 C powder reaction to prepare sheet-like toughened ceramic materials, but the process temperature is as high as 1900 ℃, which limits the popularization and application of this process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic
  • Preparation method of ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic
  • Preparation method of ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of infiltration reaction of the present invention prepares ZrB 2 -The method for ZrC-based ultra-high temperature resistant ceramics, comprising the following steps:

[0029] (1) Prepare the green body: weigh B with a mass ratio of 19:1 4 C powder and binder polycarbosilane, mix the weighed raw materials through ball milling, put the mixed powder in a mold, keep it warm at 120°C for 6 hours, and obtain a green body after cross-linking molding;

[0030] (2) Firing the porous rigid preform: pyrolyze the above-mentioned green body under vacuum at 900°C and keep it warm for 1 hour to obtain the porous rigid preform;

[0031] (3) Preparation of zirconium-containing alloys: using metal zirconium and metal copper with a mass ratio of 1:1 as the main raw materials, through vacuum induction melting, to prepare zirconium-containing alloys;

[0032] (4) Infiltration reaction: take the porous rigid prefabricated body prepared above as the base material, and the zirconium-c...

Embodiment 2

[0037] A kind of infiltration reaction of the present invention prepares ZrB 2 -The method for ZrC-based ultra-high temperature resistant ceramics, comprising the following steps:

[0038] (1) Prepare the green body: weigh B with a mass ratio of 15:4:1 4 C powder, pore-forming agent flour and binder polycarbosilane are mixed by ball milling the weighed raw materials, and molded under a pressure of 100 MPa to obtain a green body;

[0039] (2) Firing the porous rigid preform: the above-mentioned green body was cracked at 1600°C under vacuum conditions, and kept for 0.5h to obtain a porous rigid preform;

[0040] (3) Preparation of zirconium-containing alloys: using metal zirconium and metal copper with a mass ratio of 3:1 as the main raw materials, through arc melting, to prepare zirconium-containing alloys;

[0041] (4) Infiltration reaction: take the porous rigid prefabricated body prepared above as the base material, and the zirconium-containing alloy as the infiltration agen...

Embodiment 3

[0045] A kind of infiltration reaction of the present invention prepares ZrB 2 -The method for ZrC-based ultra-high temperature resistant ceramics, comprising the following steps:

[0046] (1) Prepare the green body: weigh B with a mass ratio of 5:1:1:3 4 C powder, filler SiC powder, pore-forming agent flour and binder polycarbosilane, mixing the weighed raw materials by ball milling, and molding under a pressure of 200MPa to obtain a green body;

[0047] (2) Firing the porous rigid preform: the above-mentioned green body is subjected to high temperature cracking at 1600°C under vacuum conditions and kept for 1 hour to obtain a porous rigid preform;

[0048] (3) Preparation of zirconium-containing alloys: using metal zirconium and elemental silicon with a mass ratio of 97:3 as the main raw materials, through electric arc melting, to prepare zirconium-containing alloys;

[0049] (4) Infiltration reaction: take the porous rigid prefabricated body prepared above as the base mat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Bending strengthaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Wire ablation rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic. The preparation method comprises the following process steps of: weighing raw materials, mixing by ball milling, and performing die pressing or crosslinking molding to obtain a green body; performing high-temperature cracking and heat preserving on the green body to obtain a porous rigid prefabricated body; undergoing an infiltration reaction by taking the porous rigid prefabricated body as a substrate and taking a zirconium-containing alloy as an infiltration agent to obtain semi-finished ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic; and embedding the semi-finished ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic with B4C powder or SiC powder and performing high-temperature treatment to obtain the ZrB2-ZrC-based ultrahigh-temperature-resistant ceramic. The process of the invention has the advantages of low preparation temperature and low cost. By adopting the preparation method, a ceramic product with high density, high mechanical property and high temperature resistance can be obtained.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a preparation method of an ultra-high temperature resistant ceramic matrix composite material. Background technique [0002] The aerospace field has extremely high requirements for materials such as high temperature resistance, ablation resistance, corrosion resistance, specific strength, specific stiffness, low density, and high toughness. Existing materials have shown limitations. In this context, the development of new materials with high strength, high modulus, and long-term physical and chemical stability in ultra-high temperature gas and oxidizing atmospheres has become a research hotspot in the field of materials at home and abroad. [0003] The high-temperature strength, oxidation resistance and thermal shock resistance of ultra-high temperature heat-resistant materials make them suitable for extreme environments including hypersonic long-duration flight, atmo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/58C04B35/56C04B35/622
Inventor 王松张守明李伟祝玉林向阳陈朝辉
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com