Preparation method of light metal/boron carbide composite material

Patent metadata

Field	Value
Publication number	US-12522897-B2
Application number	US-202217583234-A
Country	US
Kind code	B2
Filing date	Jan 25, 2022
Priority date	Dec 8, 2021
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

The present invention provides a preparation method of a light metal/boron carbide composite material, comprising: (A) providing a boron carbide precursor and a light metal powder to perform a pretreatment mixing process to form a precursor; (B) performing a vacuum hot pressing molding or a vacuum cold isostatic pressing molding on the precursor to make the precursor form a light metal/boron carbide compound green body that is uniform; (C) performing a thermal treatment on the light metal/boron carbide compound green body to make the light metal/boron carbide compound green body form a light metal/boron carbide compound sintered body; and (D) performing a cold rolling treatment or a hot rolling treatment on the light metal/boron carbide compound sintered body to obtain a light metal/boron carbide composite material.

First claim

What is claimed is:

1 . A preparation method of a light metal/boron carbide composite material, comprising:
(A) providing a boron carbide precursor and a light metal powder to perform a pretreatment mixing process to form a precursor, wherein the light metal powder acts as a catalytic medium so that the boron carbide precursor is catalyzed by the light metal powder; (B) performing a vacuum cold isostatic pressing molding on the precursor to make the precursor form a light metal/boron carbide compound green body that is uniform; (C) performing a thermal treatment on the light metal/boron carbide compound green body to make the light metal/boron carbide compound green body form a light metal/boron carbide compound sintered body; and (D) performing a cold rolling treatment or a hot rolling treatment on the light metal/boron carbide compound sintered body to obtain a light metal/boron carbide composite material, wherein the carbide precursor includes a mixture of h-boron nitride and carbon black and/or a mixture of boron oxide and carbon black, wherein the boron carbide precursor comprises 1 wt % to 49 wt % of boron oxide and 0.1 to 4.9 wt % of carbon black, and/or 1 wt % to 49 wt % of h-boron nitride and 1 to 4.9 wt % of carbon black, wherein the light metal powder is selected from aluminum powder, magnesium powder and a combination thereof, wherein the cold isostatic pressing molding uses a molding pressure of more than or equal to 3000 kgf/cm 2 , and wherein the thermal treatment uses a vacuum microwave irradiation or a vacuum thermal treatment temperature of more than or equal to 600° C.

2 . The preparation method of a light metal/boron carbide composite material of claim 1 , wherein the aluminum powder and magnesium powder are spherical, and the light metal powder has an average particle size of 1 to 100 microns.

3 . The preparation method of a light metal/boron carbide composite material of claim 1 , wherein the pretreatment mixing process of step (A) uses a high-speed mixer, which has a rotation speed of more than or equal to 300 rpm and a running time of more than or equal to 1 minute, for mixing.

4 . The preparation method of a light metal/boron carbide composite material of claim 1 , wherein the vacuum cold isostatic pressing molding puts the precursor into a vacuum package mold for proceeding with a cold isostatic pressing process, so that the precursor is molded by isostatic pressing to form the light metal/boron carbide compound green body.

5 . The preparation method of a light metal/boron carbide composite material of claim 1 , wherein the microwave irradiation uses a microwave output power of more than or equal to 1950 W, a microwave irradiation time between 1 and 14 hours, and a vacuum degree of more than or equal to 1×10 −2 torr.

6 . The preparation method of a light metal/boron carbide composite material of claim 1 , wherein the hot rolling treatment uses a hot rolling temperature of more than or equal to 500° C.

Assignees

• Nat Chung Shan Inst Science & Tech

Inventors

• Chen Yen-Chung
• Huang Ker-Jer
• Gee Chuen-Ming
• Hsu Wei-Ting

Classifications

• C22F1/02 Primary

  in inert or controlled atmosphere or vacuum (adjusting the composition of the atmosphere C21D1/76) · CPC title

• C22F1/00

  Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• C22C29/062

  based on B4C · CPC title

• C22C1/053

  with in situ formation of hard compounds · CPC title

• C22C32/0057

  based on B4C · CPC title