Preparation method for alternating frequency ultrasound coupling hot-pressing infiltration porous ceramic enhanced magnesium matrix composite material

A technology of porous ceramics and ultrasonic coupling, applied in the field of preparation of magnesium-based composite materials, can solve the problems of poor forming ability and low plasticity, achieve the effects of reducing casting defects, solving poor wettability, and improving strength and toughness

Active Publication Date: 2018-10-19
TAIYUAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of low plasticity and poor formability of existing ceramic-reinforced magnesium-based composite materials, and provides a preparation method for cross-frequency ultrasonic coupling hot-pressing impregnated porous ceramic-reinforced magnesium-based composite materials

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  • Preparation method for alternating frequency ultrasound coupling hot-pressing infiltration porous ceramic enhanced magnesium matrix composite material
  • Preparation method for alternating frequency ultrasound coupling hot-pressing infiltration porous ceramic enhanced magnesium matrix composite material
  • Preparation method for alternating frequency ultrasound coupling hot-pressing infiltration porous ceramic enhanced magnesium matrix composite material

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specific Embodiment approach 1

[0023] Specific implementation mode 1: This implementation mode is a preparation method of cross-frequency ultrasonic coupling hot-pressing impregnation porous ceramic reinforced magnesium-based composite material, which is carried out according to the following steps:

[0024] 1. Preparation of a porous ceramic-coated magnesium alloy melt combination: heat the porous ceramic powder to 400°C-600°C, then immerse the liquid magnesium alloy into the porous ceramic powder at 400°C-600°C, and then conduct cross-frequency ultrasound Coupled hot-press rapid prototyping, natural cooling to room temperature, to obtain a combination of porous ceramics coated with magnesium alloy melt;

[0025] The mass ratio of the porous ceramic powder at 400°C to 600°C to the liquid magnesium alloy is 1:(1.5 to 2);

[0026] The method for rapid prototyping of cross-frequency ultrasonic coupling hot pressing is as follows: the first-stage ultrasonic and hot pressing are carried out simultaneously under...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the porous ceramic powder described in step 1 is α-SiC porous ceramic powder and α-Al 2 o 3 One or a mixture of two porous ceramic powders; the particle size of the α-SiC porous ceramic powder is 50 μm to 300 μm, the pore size is 15 μm to 35 μm, and the porosity is 40% to 70%; the α– Al 2 o 3 The particle diameter of the porous ceramic powder is 30 μm-300 μm, the pore diameter is 15 μm-35 μm, and the porosity is 40%-70%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the liquid magnesium alloy described in step 1 is magnesium alloy AZ91. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method for an alternating frequency ultrasound coupling hot-pressing infiltration porous ceramic enhanced magnesium matrix composite material, and relates to a preparation method for the magnesium matrix composite material. The preparation method solves the technical problems that an existing ceramic enhanced magnesium matrix composite material is low in plasticity and poor in forming capacity. The preparation method comprises the steps that a combination of a porous ceramic clad magnesium alloy melt is prepared through alternating frequency ultrasound coupling hot-pressing quick molding; and temperature rise mechanical stirring is carried out under the alternating frequency ultrasound vibration effect, and alternating frequency ultrasound coupling hot-pressing quick molding is carried out. According to the preparation method, through alternating frequency ultrasound coupling hot-pressing quick molding, alternating frequency ultrasound treatment can improve the magnesium liquid infiltration capacity, the temperature rise mechanical stirring facilitates diffusion and improves the structure homogeneity, the hot-pressing quick molding can reducecasting flaws, refine grains and improve distribution of a second phase, and the obdurability of the porous ceramic enhanced magnesium matrix composite material can be obviously improved under the effect of alternating frequency ultrasound coupling hot-pressing quick molding.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material. Background technique [0002] The lightweight of materials is an inevitable requirement for the rapid development of aerospace, electronic communication and automobile industries. As the lightest engineering material, magnesium alloy has obvious advantages in lightweight applications, but when magnesium and its alloys are used as structural materials, their plasticity is relatively low. Poor and relatively low mechanical properties. In this context, magnesium-based composites have high specific strength, good damping and shock absorption, superior machinability, and low cost advantages, which overcome the mechanical property limitations of magnesium alloys to a certain extent and have received widespread attention. In the preparation process of magnesium matrix composites, the selection of reinforcement phase has an important influence on the performance of magnesiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C23/00C22C32/00
CPCC22C1/1036C22C23/00C22C32/00
Inventor 聂凯波朱智浩韩俊刚杨安邓坤坤
Owner TAIYUAN UNIV OF TECH
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