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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 to a composite material with a rare earth magnesium alloy as a matrix and its preparation, an aluminum borate whisker reinforced rare earth magnesium alloy composite material and its preparation, and the field of using the aluminum borate whisker as a reinforcing body, To achieve the effect of simple preparation process, high elastic modulus, and solving the problem of exhaust

Active Publication Date: 2021-02-26
SHANGHAI JIAO TONG 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 the steps that A, metal or intermediate alloy raw materials adopted for preparing rare earth magnesium alloy are heated, melted and refined under the protective atmosphere, magnesium rare earth alloy melt is prepared, and heat preservation is conducted; B, an aluminum borate whisker prefabricated part and a metal cushion block are preheated and subjected to heat preservation; C, the aluminum borate whisker prefabricated part and themetal cushion block are put into a preheated metal mold; and D, magnesium alloy liquid obtained in the step A is poured into the metal mold filled with the whisker prefabricated part and the metal cushion block, and infiltration forming is performed under the pressure of 0.1-150 MPa. The aluminum borate whisker reinforced rare earth magnesium alloy composite material with high strength and high elasticity modulus is prepared for the first time by controlling the structure and performance of the aluminum borate whisker reinforced rare earth magnesium alloy composite material by controlling themagnesium alloy liquid components, the pouring temperature, the whisker prefabricated part preheating temperature, the mold preheating temperature, the extrusion pressure and the like.

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 Applications(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 JIAO TONG UNIV