Transition metal boride-glass ultra-high temperature oxidation resistant composite material and preparation method thereof

A high-temperature anti-oxidation and transition metal technology, which is applied in the field of transition metal boride-glass ultra-high temperature anti-oxidation composite materials and its preparation, can solve the problem of transition metal boride-glass ultra-high temperature anti-oxidation composite materials that have been reported but have not been found yet. Technical and other issues, to achieve the effects of lower sintering temperature, simple implementation, and good thermal erosion resistance

Active Publication Date: 2019-10-25
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, up to now, no related technologies of transition metal boride-glass ultra-high temperature oxidation resistant composite materials have been reported.

Method used

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  • Transition metal boride-glass ultra-high temperature oxidation resistant composite material and preparation method thereof
  • Transition metal boride-glass ultra-high temperature oxidation resistant composite material and preparation method thereof
  • Transition metal boride-glass ultra-high temperature oxidation resistant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example proposes a TiB 2 -Glass ultra-high temperature oxidation-resistant composite material, the composite material is made of TiB 2 and glass, the TiB 2 The mass accounts for 95% of the total mass of the composite material. The glass is silicate glass, and its chemical composition is calculated as: B 2 o 3 7%, Al 2 o 3 5%, ZrO 2 3%, CaO 3%, KNO 3 12%, the balance is SiO 2 .

[0029] This embodiment TiB 2 -The preparation method of the glass ultra-high temperature oxidation-resistant composite material comprises the following steps:

[0030] Step 1. TiB with particle size less than 3 μm 2 Put the powder and glass powder with a particle size of less than 5 μm into a high-energy ball mill, and ball mill and mix for 4 hours under the condition of a ball milling rate of 320r / min to obtain a mixed powder;

[0031] Step 2, using a powder tablet press or a cold isostatic press to compact the mixed powder described in step 1, and control the compacting for...

Embodiment 2

[0036] This example proposes a TiB 2 -Glass ultra-high temperature oxidation-resistant composite material, the composite material is made of TiB 2 and glass, the TiB 2 The mass accounts for 90% of the total mass of the composite material. The glass is silicate glass, and its chemical composition is calculated as: B 2 o 3 7%, Al 2 o 3 5%, ZrO 2 3%, CaO 3%, KNO 3 12%, the balance is SiO 2 .

[0037] This embodiment TiB 2 -The preparation method of the glass ultra-high temperature oxidation-resistant composite material comprises the following steps:

[0038] Step 1. TiB with particle size less than 3 μm 2 The powder and glass powder with a particle size of less than 5 μm are added to a high-energy ball mill, and ball milled and mixed for 2 hours under the condition of a ball milling rate of 500 r / min to obtain a mixed powder;

[0039] Step 2, using a powder tablet press or a cold isostatic press to compact the mixed powder described in step 1, and control the compr...

Embodiment 3

[0044] This example proposes a ZrB 2 -Glass ultra-high temperature oxidation-resistant composite material, the composite material is made of ZrB 2 and glass, the ZrB 2 The mass accounts for 90% of the total mass of the composite material. The glass is silicate glass, and its chemical composition is calculated as: B 2 o 3 20%, Al 2 o 3 2%, ZrO 2 10%, SrO 3%, Na 2 O 5%, the balance is SiO 2 .

[0045] In this embodiment ZrB 2 -The preparation method of the glass ultra-high temperature oxidation-resistant composite material comprises the following steps:

[0046] Step 1, ZrB with particle size less than 3 μm 2 Put the powder and glass powder with a particle size of less than 5 μm into a high-energy ball mill, and ball mill and mix for 6 hours under the condition of a ball milling rate of 200r / min to obtain a mixed powder;

[0047] Step 2, using a powder tablet press or a cold isostatic press to compress the mixed powder described in step 1, and control the compressi...

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Abstract

The invention provides a transition metal boride-glass composite material with ultrahigh-temperature oxidation resistance. The composite material is prepared from transition metal boride and glass, wherein the transition metal boride is HfB2, ZrB2 or TiB2, and the glass is silicate glass. The invention further provides a preparation method of the transition metal boride-glass composite material with ultrahigh-temperature oxidation resistance. The preparation method comprises the following steps: 1, adding transition metal boride powder and glass powder to a high-energy ball mill for ball milling to obtain mixed powder; 2, performing compression molding on the mixed powder to obtain a compressed blank; 3, performing pressureless sintering on the compressed blank to obtain the transition metal boride-glass composite material with ultrahigh-temperature oxidation resistance. A composite oxide film with an oxide as a skeleton and borosilicate glass as a filling agent can be formed in situ by the composite material in a high-temperature oxidation environment, and the composite material has excellent high-temperature oxidation resistance and good high-temperature high-speed airflow washout resistance.

Description

technical field [0001] The invention belongs to the technical field of ultra-high temperature protection, and in particular relates to a transition metal boride-glass ultra-high temperature anti-oxidation composite material and a preparation method thereof. Background technique [0002] Among borides of all transition metals, borides of group IVB metals have the best high temperature oxidation resistance at 1500°C. At the same time, ultra-high temperature boride ceramics have a high melting point, good chemical stability and high-temperature mechanical properties, and have broad application prospects in the ultra-high temperature field. Boride ceramics have been widely used as hot-end parts alone through hot-pressing sintering process, or as important components in high-temperature protective coatings of carbon-carbon composites. [0003] However, the high temperature oxidation resistance of ultra-high temperature boride ceramics is limited by the oxidation products (B 2 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/622C04B35/64C03C3/11C03C3/091C03C3/093
CPCC03C3/091C03C3/093C03C3/111C04B35/58007C04B35/58071C04B35/58078C04B35/62218C04B35/64C04B2235/365C04B2235/6562C04B2235/6567C04B2235/668C04B2235/9684
Inventor 汪欣李争显杜继红杨涛李晴宇严鹏彭易发
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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