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Aluminum borate whisker reinforced rare earth magnesium alloy composite material and preparation method thereof

A technology of aluminum borate crystal whiskers and composite materials, which is applied in the fields of using aluminum borate crystal whiskers as reinforcements, aluminum borate crystal whiskers reinforced rare earth magnesium alloy composite materials and preparation thereof, and rare earth magnesium alloy as matrix composite materials and their preparation fields, Achieve the effect of low equipment requirements, improved extrusion infiltration process, and high strength

Active Publication Date: 2022-03-01
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of aluminum borate whisker reinforced rare earth magnesium alloy composite material and its preparation in order to solve the bottleneck problem that the high strength and high elastic modulus of the current aluminum borate whisker reinforced magnesium matrix composite material cannot be combined method

Method used

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  • Aluminum borate whisker reinforced rare earth magnesium alloy composite material and preparation method thereof
  • Aluminum borate whisker reinforced rare earth magnesium alloy composite material and preparation method thereof
  • Aluminum borate whisker reinforced rare earth magnesium alloy composite material and preparation method thereof

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Embodiment 1

[0037] This embodiment provides an aluminum borate whisker-reinforced rare-earth magnesium alloy composite material and its preparation method, specifically adopting the following steps:

[0038] (1) High-purity magnesium (purity ≥ 99.95%), Mg-30Y (mass fraction) master alloy, Mg-87Gd (mass fraction) master alloy, pure Zn (purity ≥ 99.99%), Mg-30Zr (mass fraction) master alloy , in a volume fraction of 1% SF 6 and CO 2 Under the protection of a mixed atmosphere, a rare earth magnesium alloy melt (95% by volume) with a composition of Mg-10.38Gd-2.86Y-0.97Zn-0.43Zr (mass percent) was prepared, and kept at 750° C. for 10 minutes;

[0039] (2) In the muffle furnace, the aluminum borate whisker preform with a volume fraction of 5% is heated to 750°C together with a steel metal pad with an exhaust structure, and kept for 0.5h;

[0040] (3) Put the aluminum borate whisker preform and the steel metal spacer with exhaust structure into a metal mold preheated to 200°C, wherein the dia...

Embodiment 2

[0044] This embodiment provides an aluminum borate whisker-reinforced rare-earth magnesium alloy composite material and its preparation method, specifically adopting the following steps:

[0045] (1) High-purity magnesium (purity ≥ 99.95%), Mg-30Y (mass fraction) master alloy, Mg-87Gd (mass fraction) master alloy, pure Zn (purity ≥ 99.99%), Mg-30Zr (mass fraction) master alloy , in a volume fraction of 1% SF 6 and CO 2 A rare earth magnesium alloy melt (77% by volume) with a composition of Mg-9.22Gd-2.60Y-0.61Zn-0.41Zr (mass percent) was prepared under the protection of a mixed atmosphere, and kept at 720° C. for 20 minutes;

[0046] (2) In the muffle furnace, the aluminum borate whisker preform with a volume fraction of 23% is heated to 700°C together with a steel metal pad with an exhaust structure, and kept for 1h;

[0047] (3) Put the aluminum borate whisker preform and the steel metal spacer with exhaust structure into a metal mold preheated to 200°C, wherein the diamet...

Embodiment 3

[0051] This embodiment provides an aluminum borate whisker-reinforced rare-earth magnesium alloy composite material and its preparation method, specifically adopting the following steps:

[0052] (1) High-purity magnesium (purity ≥ 99.95%), Mg-30Y (mass fraction) master alloy, Mg-87Gd (mass fraction) master alloy, pure Zn (purity ≥ 99.99%), Mg-30Zr (mass fraction) master alloy , in a volume fraction of 0.2% SF 6 and CO 2 A rare earth magnesium alloy melt (74% by volume) with a composition of Mg-12.51Gd-3.13Y-1.05Zn-0.62Zr (mass percent) was prepared under the protection of a mixed atmosphere, and kept at 700° C. for 30 minutes;

[0053] (2) In the muffle furnace, the aluminum borate whisker preform with a volume fraction of 26% is heated to 750°C together with a steel metal pad with an exhaust structure, and kept for 2.5 hours;

[0054] (3) Put the aluminum borate whisker preform together with the steel metal spacer into a metal mold preheated to 300°C, wherein the diameter ...

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Abstract

The invention discloses an aluminum borate whisker-reinforced rare-earth magnesium alloy composite material and a preparation method thereof. The method comprises: A. heating, melting and refining the metal or intermediate alloy raw materials used in the preparation of the rare-earth magnesium alloy in a protective atmosphere, and preparing Magnesium rare earth alloy melt, and heat preservation; B. Preheating and heat preservation of the aluminum borate whisker preform and the metal pad; C. Put the aluminum borate whisker preform and the metal pad together into the preheated metal mold D, the magnesium alloy liquid that step A obtains is poured in the metal mold that whisker prefabricated part and metal spacer are housed, and impregnated forming under 0.1-150MPa pressure. The invention regulates the microstructure and properties of the aluminum borate whisker-reinforced rare earth magnesium alloy composite material by controlling the composition of the magnesium alloy liquid and the pouring temperature, the preheating temperature of the whisker preform, the preheating temperature of the mold, and the extrusion pressure. Aluminum borate whiskers reinforced rare earth magnesium alloy composites with high strength and high elastic modulus.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite material preparation, and in particular relates to an aluminum borate whisker-reinforced rare earth magnesium alloy composite material and a preparation method thereof, in particular to an aluminum borate whisker-reinforced rare-earth magnesium alloy composite material. Composite materials and methods for their preparation. Background technique [0002] Magnesium alloy is currently the lightest structural metal material. It has the characteristics of high specific strength, high specific stiffness, excellent damping performance and electromagnetic shielding performance. It has very broad application prospects in aerospace, automotive, electronics and other fields. However, the inherent low mechanical strength and elastic modulus, poor creep resistance and wear resistance of magnesium alloys limit their further applications in the aerospace and automotive industries. At present, com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/12C22C49/04C22C49/14C22C101/08
CPCC22C47/12C22C49/04C22C49/14
Inventor 吴玉娟常治宇彭立明刘保良兰乔宿宁邓庆琛薛晓瑜武千叶薛艳婷丁文江
Owner SHANGHAI JIAOTONG UNIV