Superhard multi-component boride particle reinforced aluminum-based composite material and preparation method thereof

A technology of boride particles and composite materials, which is applied in the field of superhard multi-component boride particles reinforced aluminum-based composite materials and its preparation, can solve the problems of high-entropy boride ceramics, such as difficulty in sintering and densification, long preparation cycle, and low density. , to achieve the effect of high utilization rate of raw materials, good wettability and high interface bonding strength

Active Publication Date: 2021-05-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the raw material powder needs to be mechanically alloyed by high-energy ball milling before spark plasma sintering, there are disadvantages such as long preparation cycle and high energy consumption.
At the same time, oxide impurities will inevitably be introduced during the sintering process, which will lead to difficulty in sintering and densification of high-entropy boride ceramics and low density.

Method used

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  • Superhard multi-component boride particle reinforced aluminum-based composite material and preparation method thereof
  • Superhard multi-component boride particle reinforced aluminum-based composite material and preparation method thereof
  • Superhard multi-component boride particle reinforced aluminum-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Step 1, weighing: prepare the required raw materials according to the following mass percentages: industrial pure aluminum 84.15, Al-1B master alloy 15, high-purity transition metal elements Hf, Ta, Zr, Nb, Ti single mass block with a molar ratio of 0.2 :0.2:0.2:0.2:0.2:1, its total mass percentage is 0.85.

[0034] Step 2, smelting: use a vacuum arc melting furnace to prepare superhard (Hf 0.2 Ta 0.2 Zr 0.2 Nb 0.2 Ti 0.2 )B 2 Multi-component boride particle reinforced aluminum matrix composites.

[0035] 1) Put the weighed pure aluminum and Hf, Ta, Zr, Nb, Ti into the water-cooled copper crucible of the vacuum electric arc furnace according to the melting point from low to high, and place a pure titanium block in the other crucible.

[0036] 2) Vacuum to 1×10 -5 Pa, then pass through the argon protective gas to 4×10 2 Pa. Turn on the smelting DC power switch, first smelt pure Ti blocks to absorb the remaining oxygen in the furnace cavity, then smelt pure alumin...

Embodiment 2

[0040] Step 1, weighing: prepare the required raw materials according to the following mass percentages: industrial pure aluminum 80.60, Al-3B master alloy 16.67, and the molar ratio of high-purity transition metal elements Hf, Ta, Zr, Nb, Ti single mass block is 0.2 :0.2:0.2:0.2:0.2:1, its total mass percentage is 2.73.

[0041] Step 2, smelting: use a vacuum arc melting furnace to prepare superhard (Hf 0.2 Ta 0.2 Zr 0.2 Nb 0.2 Ti 0.2 )B 2 Multi-component boride particle reinforced aluminum matrix composites.

[0042] 1) Put the weighed pure aluminum and Hf, Ta, Zr, Nb, Ti into the water-cooled copper crucible of the vacuum electric arc furnace according to the melting point from low to high, and place a pure titanium block in the other crucible.

[0043] 2) Vacuum to 1×10 -5 Pa, then pass through the argon protective gas to 4×10 2 Pa. Turn on the smelting DC power switch, first smelt pure Ti blocks to absorb the remaining oxygen in the furnace cavity, and then smelt...

Embodiment 3

[0047] Step 1, weighing: Prepare the required raw materials according to the following mass percentages: industrial pure aluminum 61.21, Al-3B master alloy 33.33, and the molar ratio of high-purity transition metal elements Hf, Ta, Zr, Nb, and Ti elemental block is 0.2 :0.2:0.2:0.2:0.2:1, and its total mass percentage is 5.46 respectively.

[0048] Step 2, smelting: use a vacuum arc melting furnace to prepare superhard (Hf 0.2 Ta 0.2 Zr 0.2 Nb 0.2 Ti 0.2 )B 2 Multi-component boride particle reinforced aluminum matrix composites.

[0049] 1) Put the weighed pure aluminum and Hf, Ta, Zr, Nb, Ti into the water-cooled copper crucible of the vacuum electric arc furnace according to the melting point from low to high, and place a pure titanium block in the other crucible.

[0050] 2) Vacuum to 1×10 -5 Pa, then pass through the argon protective gas to 4×10 2 Pa. Turn on the smelting DC power switch, first smelt pure Ti blocks to absorb the remaining oxygen in the furnace cav...

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Abstract

The invention discloses a superhard multi-component boride particle reinforced aluminum-based composite material and a preparation method thereof. The method includes the following steps that (1) raw materials are weighed, specifically, industrial pure aluminum, Hf, Ta, Zr, Nb and Ti elementary substance blocks and aluminum-boron binary intermediate alloy are weighed in proportion; and (2) smelting is conducted, specifically, the weighed industrial pure aluminum and the weighed Hf, Ta, Zr, Nb and Ti elementary substance blocks are put into a water-cooled copper crucible of a vacuum arc furnace in the order of the melting points from low to high, and an aluminum alloy ingot is obtained through smelting; and an aluminum alloy ingot and the aluminum-boron binary intermediate alloy are placed in the same crucible and smelted, and the (Hf0.2Ta0.2Zr0.2Nb0.2Ti0.2)B2 multi-element boride particle reinforced aluminum matrix composite material is obtained. According to the method, a vacuum electric arc melting mode is used, and transition metal particles and boron in aluminum melt are directly subjected to in-situ chemical reaction at high temperature to form multi-component boride particles. In addition, the method has the flexibility of microstructure and component design, and a series of transition metal multi-component boride particle reinforced aluminum-based composite materials with different components can be rapidly prepared.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and in particular relates to a superhard multi-component boride particle-reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Due to the advantages of low density, high specific strength, and good dimensional stability, particle-reinforced aluminum matrix composites have been more and more widely used in aerospace, automotive engines and other fields. At present, the commonly used reinforcement phase particles are mainly single-component carbides, borides and nitrides, such as SiC, TiB 2 , TiC, Al 3 BC, AlN, etc. [0003] However, with the continuous improvement of performance and other requirements, traditional one-component compounds are gradually difficult to meet the requirements in terms of hardness and oxidation resistance, so the development of new reinforcement phases has become a top priority. Compared with traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00C22C32/00
CPCC22C1/1036C22C21/00C22C32/0073C22C1/1052
Inventor 聂金凤范勇陈翔郝肖杰伍玉立赵永好李玉胜曹阳周浩
Owner NANJING UNIV OF SCI & TECH
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