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

Method for preparing zirconium-aluminium-carbon ceramic cube material by in-situ reaction heat-pressing

A zirconium-aluminum-carbon ceramic and in-situ reaction technology is applied in the field of preparing zirconium-aluminum-carbon ceramic bulk materials by in-situ reaction hot pressing, which can solve the problems of high sintering temperature, complicated process, and unfavorable material mechanical properties.

Inactive Publication Date: 2007-08-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of ex-situ synthesis is complicated, and the sintering temperature is high, which has a great impact on the properties of the material, especially not conducive to the mechanical properties of the material.
So far, there are few reports on the properties of zirconium aluminum carbon ceramic bulk materials

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
  • Method for preparing zirconium-aluminium-carbon ceramic cube material by in-situ reaction heat-pressing
  • Method for preparing zirconium-aluminium-carbon ceramic cube material by in-situ reaction heat-pressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw materials are 100.00 grams of Zr powder, 29.55 grams of Al powder and 26.33 grams of C powder with a particle size of about 300 meshes, ball milled for 10 hours, cold pressed into a cake shape under a pressure of 15 MPa, put into a graphite mold, and pass through an inert gas ( Argon) was used as the protective gas in a hot-pressing furnace at a rate of 10°C / min to 1700°C for in-situ reaction hot-pressing for 1 hour, and the hot-pressing pressure was 30MPa. The main reaction product obtained is analyzed by X-ray diffraction as Zr 3 Al 3 C 5 . The corresponding X-ray diffraction patterns and scanning electron micrographs are listed in accompanying drawings 1-2 respectively. The reaction product had a Vickers hardness of 12 GPa (with a load of 10 N), a dynamic Young's modulus and a shear modulus of 334 GPa and 142 GPa, respectively.

Embodiment 2

[0023] The raw materials are 100.00 grams of Zr powder, 39.40 grams of Al powder and 21.94 grams of C powder with a particle size of about 200 meshes. They are ball-milled for 20 hours, cold-pressed into cakes under a pressure of 10 MPa, and put into graphite molds. In a hot-pressing furnace with a protective gas, the temperature was raised to 1600° C. at a rate of 20° C. / min for in-situ reaction hot-pressing for 4 hours, and the hot-pressing pressure was 40 MPa. The main reaction product obtained is analyzed by X-ray diffraction as Zr 3 Al 3 C 5 and Zr 2 Al 3 C 4 two-phase composite materials. The corresponding X-ray diffraction patterns are listed in accompanying drawing 3.

Embodiment 3

[0025] The raw material adopts 100.00 grams of Zr powder, 44.33 grams of Al powder and 32.91 grams of C powder with a particle size of about 400 meshes, ball milled for 15 hours, cold-pressed into a cake shape under a pressure of 20 MPa, and packed into a graphite mold. for 10 -2 Pa) in a hot-pressing furnace at a rate of 15° C. / min to 1800° C. for in-situ reaction hot-pressing for 0.5 hour, and the hot-pressing pressure is 30 MPa. The main reaction product obtained is analyzed by X-ray diffraction as Zr 2 Al 3 C 4 . The corresponding fracture scanning electron micrographs are shown in Figure 4, with Zr 3 Al 3 C 5 Compared to Zr 2 Al 3 C 4 There are more obvious layered features on the cross-section.

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
Granularityaaaaaaaaaa
Shear modulusaaaaaaaaaa
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a manufacturing technology for super high temperature endurable ceramic. The feature is that it uses Zr powder, Al powder and C powder as raw material, taking ball milling for 10-30 hours, pressing to cake shape under 10-20MPa, encasing into graphite mold, heating to 1600-1900 degree centigrade in hot-pressing furnace at 2-50 degree centigrade per minutes under protection of noble gas, taking home position hot pressing / solid-liquid phase reacting for 0.5-4 hours, and the hot pressing pressure is 30-40MPa. The invention could compound high purity, high intension, and corrosion proof zirconium aluminum carbon block material at low temperature and in short tie. The material could be used in the environment temperature over 1600 degree centigrade.

Description

technical field [0001] The invention relates to the preparation technology of ultra-high temperature resistant ceramics, and in particular provides an in-situ reaction hot pressing preparation of zirconium aluminum carbon (Zr 3 Al 3 C 5 , Zr 2 Al 3 C 4 and two-phase composite) ceramic bulk materials. Background technique [0002] Zirconium aluminum carbon (Zr 3 Al 3 C 5 , Zr 2 Al 3 C 4 And two-phase composite) ceramic block material is a new type of ultra-high temperature resistant, anti-oxidation ternary material. They combine the advantages of high modulus, high hardness, oxidation resistance, corrosion resistance, high electrical conductivity, thermal conductivity, and strong damage tolerance. It has potential wide application prospects in high-tech fields such as aviation, aerospace, nuclear industry, and ultra-high temperature structural parts. Although zirconium aluminum carbon (Zr 3 Al 3 C 5 , Zr 2 Al 3 C 4 And two-phase composite) bulk materials ha...

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): C04B35/56C04B35/645
Inventor 周延春何灵峰包亦望
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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