Title:
HIGH-THERMAL-CONDUCTIVITY MAGNESIUM ALLOY CONTAINING HIGH-SOLID-SOLUBILITY RARE EARTH ELEMENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/133978
Kind Code:
A1
Abstract:
A high-thermal-conductivity magnesium alloy containing a high-solid-solubility rare earth element and a preparation method therefor. The high-thermal-conductivity magnesium alloy comprises: RE, wherein the mass fraction of RE in the high-thermal-conductivity magnesium alloy is 4%-16%, and the ultimate solid solubility in magnesium is greater than or equal to 0.8 at.%; Al, the atomic ratio of Al to RE being 0.3-4; and the remainder is Mg and unavoidable impurities. The microstructure of the high-heat-conductivity magnesium alloy comprises a first phase and a second phase, the first phase comprises a Mg matrix and RE which is solid-dissolved in the magnesium matrix, the atomic number percentage of RE which is solid-dissolved in the magnesium matrix in the first phase is 0.05-0.2%, the second phase comprises an Mg-RE phase and an Al-RE phase, and the heat conductivity of the high-heat-conductivity magnesium alloy at room temperature is greater than or equal to 100W/(m·K). Compared to existing magnesium alloys which contain a high-solid-solubility rare earth element, the magnesium alloy provided herein has obviously improved thermal conductivity.
Inventors:
LI DEJIANG (CN)
LI ZIXIN (CN)
HU BO (CN)
ZENG XIAOQIN (CN)
LI ZIXIN (CN)
HU BO (CN)
ZENG XIAOQIN (CN)
Application Number:
PCT/CN2022/078353
Publication Date:
July 20, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
C22C23/06; B22D27/04; C22C1/03; C22C23/02
Domestic Patent References:
| WO2021215220A1 | 2021-10-28 | |||
| WO2017205281A1 | 2017-11-30 |
Foreign References:
| CN107604228A | 2018-01-19 | |||
| CN110819863A | 2020-02-21 | |||
| US20080138236A1 | 2008-06-12 | |||
| CN111321324A | 2020-06-23 | |||
| CN108118226A | 2018-06-05 | |||
| CN109161770A | 2019-01-08 | |||
| CN110066949A | 2019-07-30 |
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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