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Device and method for densification of aluminum matrix composites reinforced with high volume fraction sic nanowires based on three-dimensional constrained deformation

An aluminum-based composite material, high volume fraction technology, applied in metal processing and other directions, can solve problems such as easy cracking, and achieve the effects of avoiding cracking, easy operation, and simple restraint body

Active Publication Date: 2021-08-24
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of high SiC nw In view of the problem of easy cracking of SiC nanowire-reinforced aluminum matrix composites after hot extrusion, a high volume fraction SiC nanowire-reinforced aluminum matrix composite densification device and method based on three-dimensional restrained deformation is proposed

Method used

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  • Device and method for densification of aluminum matrix composites reinforced with high volume fraction sic nanowires based on three-dimensional constrained deformation
  • Device and method for densification of aluminum matrix composites reinforced with high volume fraction sic nanowires based on three-dimensional constrained deformation
  • Device and method for densification of aluminum matrix composites reinforced with high volume fraction sic nanowires based on three-dimensional constrained deformation

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specific Embodiment approach 1

[0027] Specific Embodiment 1: In this embodiment, a high volume fraction SiC nanowire-reinforced aluminum matrix composite material densification device based on three-way constrained deformation is composed of a mold 1, a mold bottom plate 2, an upper indenter 3, a lower indenter 4, and a restraining body;

[0028] The mold 1 is a cylinder, and the mold 1 is arranged on the upper surface of the mold bottom plate 2, and the upper pressing head 3, the lower pressing head 4 and the constraint body are stacked inside the mold 1 from top to bottom; the upper pressing head 3 and the lower pressing head 4 is a cylinder, the lower end surface of the upper pressing head 3 is provided with a first cylindrical boss, and the upper end surface of the lower pressing head 4 is provided with a second boss having the same shape and size as the first boss;

[0029] The constraining body is a cylinder, and the outer peripheral surface of the constraining body is in clearance fit with the inner p...

specific Embodiment approach 2

[0034] Embodiment 2: This embodiment differs from Embodiment 1 in that: the distance between the bottom of the circular blind hole in the semi-constraining body 5 and the end surface of the semi-constraining body 5 is 2-5 mm. Other steps and parameters are the same as those in the first embodiment. The constraining body is made of two semi-constraining bodies 5 that are symmetrical up and down. When the aluminum-based composite material is filled into the cavity of the constraining body, it can be kept in close contact with the constraining body. The distance between the bottom of the circular blind hole in the semi-constraining body 5 The distance between the end faces of adjacent constraining bodies is 2-5mm, so the distance between the end face of the aluminum-based composite material and the upper or lower indenter is 2-5mm, which can ensure that the aluminum-based composite material is in a relatively uniform deformation area, so that The deformation of different parts of...

specific Embodiment approach 3

[0035]Specific embodiment three: this embodiment is different from specific embodiment one or two in that: the mold 1 is connected to the mold bottom plate 2 by bolts, the mold bottom plate 2 is provided with a through hole, and the inner lower end surface of the side wall of the mold 1 is provided with threads Hole, the bolt passes through the through hole of the mold bottom plate 2 and is screwed in the threaded hole of the side wall of the mold 1. Other steps and parameters are the same as those in the first embodiment.

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Abstract

A high volume fraction SiC nanowire-reinforced aluminum matrix composite material densification device and method based on three-dimensional constrained deformation relates to a SiC nanowire / Al composite material densification device and method. The purpose is to solve the high SiC nw SiC nanowire-reinforced Al-matrix composites with high content are prone to cracking after hot extrusion and there are problems of adverse reactions after high-temperature extrusion. The device is composed of a mold, a mold bottom plate, an upper pressing head, a lower pressing head and a constraint body. The constraint body has a cylindrical cavity. METHODS: The device was assembled and the aluminum matrix composite was placed in a cylindrical cavity, preheated and pressure applied. When the method and the mold of the invention are densified, the composite material is under three-dimensional compressive stress, and the cracking of the aluminum-based composite material can be avoided while densifying. The strength, density and elongation of aluminum matrix composites are improved. The invention is suitable for densification of aluminum-based composite materials.

Description

technical field [0001] The invention relates to a SiC nanowire / Al composite material densification device and method. Background technique [0002] In recent years, metal matrix composites with nano-reinforcement as the reinforcement phase have shown excellent properties, and have gradually become the focus of research. Generally speaking, when one of the three-dimensional dimensions of the reinforcement is less than 100nm, it can be called a nano-reinforcement. According to different size characteristics, it can be divided into zero-dimensional (nanoparticles), one-dimensional (nanowire) and two-dimensional. (nanosheet) reinforcement. Aluminum matrix composites have always been a very important research direction in the research of metal matrix composites. Among them, the research on aluminum matrix composites with SiC particles as reinforcements is the most in-depth, because SiC has excellent room temperature and high temperature mechanical properties. The interface bond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P9/04B23P25/00C22C49/14C22C101/14
CPCB23P9/04B23P25/00C22C49/14
Inventor 周畅武高辉肖云臻杨文澍周勇孝吴翌铭
Owner HARBIN INST OF TECH
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