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Reaction diffusion connecting method of superhard material aluminum magnesium boron-titanium diboride and metal

A superhard material, titanium diboride technology, applied in the field of reaction diffusion connection between superhard materials and metal materials, can solve the problems of complex process, low connection strength, low production efficiency, etc., achieve easy diffusion and improve mechanical properties Effect

Inactive Publication Date: 2013-10-09
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex process of these connection methods, the low production efficiency and low connection strength limit their application range.

Method used

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  • Reaction diffusion connecting method of superhard material aluminum magnesium boron-titanium diboride and metal

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] The thickness of the Nb plate is 3mm, the mixed powder Mg powder, Al powder and B powder are mixed at an atomic percentage of 1:1:14, and 20% by weight of TiB is added 2 Powder, the mixed powder and Nb plate are pressed into shape by mechanical pressure. according to figure 1 Place the sample in the graphite mold between the electrodes in the manner shown, raise the current to 1300A and keep it for 20min, raise the temperature of the sample to 1400°C, adjust the current and keep it warm for 10min, and finally turn off the power, and the sample is cooled to room temperature with the furnace . The vacuum degree in the furnace during the whole process is about 2×10 -3 Pa, apply a unidirectional pressure of 30MPa, take out the sample from the mold after natural cooling, superhard material AlMgB 14 -TiB 2 The hardness is 3801HV1.0.

[0021] Embodiment 2: (AlMgB 14 -TiB 2 )-Mo linking structure

Embodiment approach 2

[0022] The thickness of the Mo board is 3mm, the mixed powder Mg powder, Al powder and B powder are mixed in a molar percentage of 1:1:14, and 30% TiB is added 2 Powder, the mixed powder and Mo plate are pressed into shape by mechanical pressure. according to figure 1 Place the sample in the graphite mold between the electrodes in the manner shown, increase the current to 1500A and keep it for 20 minutes, raise the temperature of the sample to 1600°C, adjust the current for 5 minutes, and finally turn off the power, and the sample is cooled to room temperature with the furnace . The vacuum degree in the furnace during the whole process is about 2×10 -3 Pa, apply a unidirectional pressure of 60MPa, take out the sample from the mold after natural cooling, superhard material AlMgB 14 -TiB 2 The hardness is 3778HV1.0.

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Abstract

The invention discloses a reaction diffusion connecting method of superhard material aluminum magnesium boron-titanium diboride and metal, and belongs to the technical field of connection of the superhard material and a metal material. The reaction diffusion connecting method is characterized in that the surface of high-temperature metal Ta, Mo or Nb is pressed by mechanical pressure to form a corresponding metal powder layer; a lot of joule heat is generated under an electric field activation effect, so as to achieve connection of diffusion reaction with the metal material when an AlMgB14-TiB2 composite material is synthetized. The method has the advantages that mutual diffusion of elements between interfaces is facilitated by the effect of the electric field; improvement of the strength of connecting the interfaces is facilitated. More importantly, synthesis of the superhard material and connection with the metal material are achieved in one step; the method has the characteristics of high preparation efficiency and high energy utilization rate.

Description

technical field [0001] The invention relates to a reaction diffusion connection method of superhard material aluminum magnesium boron-titanium diboride and metal, which belongs to the technical field of connection of dissimilar materials. In particular, it relates to a technical scheme of a reaction diffusion connection method of a superhard material and a metal material under the action of an electric field. Background technique [0002] Superhard material is a very important engineering material. Due to its own limitations, it needs to be connected with metal materials to form composite materials. Generally, after superhard materials are synthesized, diffusion welding and brazing welding techniques can be used to realize the connection with metals. Through the connection between single-layer or multi-layer ceramic materials and metal materials, a composite layered connection interface is formed, and a material with good plasticity is set as a transition layer to relieve th...

Claims

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Application Information

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IPC IPC(8): C04B37/02
Inventor 孟庆森胡利方陈少平庄蕾程慧玲雷煜
Owner TAIYUAN UNIV OF TECH
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