Preparation method of tungsten-aluminum nitride-hafnium boride composite material

A composite material, a technology of hafnium boride, is applied in the field of preparation of tungsten-aluminum nitride-hafnium boride composite materials, and can solve the problem of internal stress micro-cracks, grain growth of ceramic materials, and influence on the mechanical properties of hafnium boride ceramic materials. and its application, to achieve the effect of excellent performance and avoid separation

Inactive Publication Date: 2014-08-13
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that it will lead to abnormal growth of grains inside the ceramic material, causing internal stress and microcracks, which seriously affect the mechanical properties and applications of hafnium boride ceramic 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
  • Preparation method of tungsten-aluminum nitride-hafnium boride composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the tungsten-aluminum nitride-hafnium boride composite material in this embodiment includes the following steps:

[0022] Step 1. Put the mixed powder of tungsten powder, aluminum nitride powder and hafnium boride powder and absolute ethanol in a planetary ball mill at a volume ratio of 1:1. Ball milling and mixing for 20 hours under the same conditions to obtain a slurry; the mass percentages of tungsten powder, aluminum nitride powder and hafnium boride powder in the mixed powder are respectively: 35% of tungsten powder, 5% of aluminum nitride powder, and 60% of hafnium boride powder %; the particle size of the hafnium boride powder and the aluminum nitride powder is not more than 5 μm, the particle size of the tungsten powder is not more than 3 μm, the mass purity of the hafnium boride powder is not less than 98%, the nitride The mass purity of aluminum powder and tungsten powder is not less than 99%;

[0023] Step 2, drying the slurry desc...

Embodiment 2

[0027] The preparation method of the tungsten-aluminum nitride-hafnium boride composite material in this embodiment includes the following steps:

[0028] Step 1. Put the mixed powder of tungsten powder, aluminum nitride powder and hafnium boride powder and absolute ethanol in a planetary ball mill at a volume ratio of 1:1. Ball milling and mixing for 20 hours under the same conditions to obtain a slurry; the mass percentages of tungsten powder, aluminum nitride powder and hafnium boride powder in the mixed powder are respectively: 80% of tungsten powder, 10% of aluminum nitride powder, and 10% of hafnium boride powder %; the particle size of the hafnium boride powder and the aluminum nitride powder is not more than 5 μm, the particle size of the tungsten powder is not more than 3 μm, the mass purity of the hafnium boride powder is not less than 98%, the nitride The mass purity of aluminum powder and tungsten powder is not less than 99%;

[0029] Step 2, drying the slurry des...

Embodiment 3

[0033] The preparation method of the tungsten-aluminum nitride-hafnium boride composite material in this embodiment includes the following steps:

[0034] Step 1. Put the mixed powder of tungsten powder, aluminum nitride powder and hafnium boride powder and absolute ethanol in a planetary ball mill at a volume ratio of 1:1. Ball milling and mixing for 20 hours under the same conditions to obtain a slurry; the mass percentages of tungsten powder, aluminum nitride powder and hafnium boride powder in the mixed powder are respectively: 39% of tungsten powder, 1% of aluminum nitride powder, and 60% of hafnium boride powder %; the particle size of the hafnium boride powder and the aluminum nitride powder is not more than 5 μm, the particle size of the tungsten powder is not more than 3 μm, the mass purity of the hafnium boride powder is not less than 98%, the nitride The mass purity of aluminum powder and tungsten powder is not less than 99%;

[0035] Step 2, drying the slurry desc...

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method of a tungsten-aluminum nitride-hafnium boride composite material, which comprises the following steps: 1. proportionally mixing tungsten powder-aluminum nitride powder-hafnium boride powder mixed powder with anhydrous ethanol, and carrying out ball milling to obtain a slurry; 2. drying the slurry, and grinding to obtain a blank; and 3. carrying out hot pressed sintering on the blank to obtain the tungsten-aluminum nitride-hafnium boride composite material. The aluminum nitride introduced into the tungsten-hafnium boride composite system can enhance the room-temperature fracture toughness of the composite material and lower the sintering temperature; and the mechanical alloying can further lower the sintering temperature of the composite material and avoid the separation between the ceramic phase and metals. The tungsten-aluminum nitride-hafnium boride composite material prepared by the method has favorable compatibility between room-temperature fracture toughness and high-temperature tensile strength.

Description

technical field [0001] The invention belongs to the technical field of cermet composite materials, and in particular relates to a preparation method of a tungsten-aluminum nitride-hafnium boride composite material. Background technique [0002] Ultra-high temperature materials (UHTM) are playing an increasingly important role in defense and aerospace. The military power represented by the United States relies on its scientific and technological advantages to vigorously develop advanced TMD (Theater Missile Defense System) and NMD (National Missile Defense System), which pose a great threat to other countries' ballistic missiles. In terms of national defense, our country is now facing severe challenges. In order to change this situation, maintain our country's status as a major country, maintain peace, prevent wars, and break the unilateral advantage of the world's military powers, we must improve our country's ballistic ballistic penetration capabilities. Whether it is TMD ...

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): C22C1/05C22C1/10C22C27/04C22C29/14C22C32/00C22C30/00
Inventor 喻吉良张如郑欣李来平夏明星白润刘辉王晖
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap