Method of manufacturing aluminum-based clad heat sink, and aluminum-based clad heat sink manufactured thereby
AssigneePukyong National University Industry-University Cooperation Foundation
InventorHansang Kwon
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Abstract
Disclosed are a method of manufacturing an aluminum-based clad heat sink, and an aluminum-based clad heat sink manufactured by the method. The method includes ball-milling (i) aluminum or aluminum alloy powder and (ii) carbon nanotubes (CNT) to prepare a composite powder, preparing a multi-layered billet using the composite billet, and directly extruding the multi-layered billet using an extrusion die to produce a heat sink. The method has an advantage of producing a light high-strength high-conductivity aluminum-based clad heat sink having an competitive advantage in terms of price by using direct extrusion that is suitable for mass production due to its simplicity in process procedure and equipment required.
Claims8
A method of manufacturing an aluminum-based clad heat sink, the method comprising:
- (A) preparing a plurality of composite powders by ball-milling (i) aluminum or aluminum alloy powder and (ii) carbon nanotubes (CNT);
- (B) preparing a multi-layered billet using the plurality of composite powders;
- and
- (C) directly extruding the multi-layered billet using an extrusion die,
- wherein the multi-layered billet comprises a first billet having a can shape and serving as a second shell layer;
- a second billet disposed inside the first billet as a first shell layer;
- and a third billet disposed inside the second billet as a core layer,
- wherein the first billet is made of aluminum, and the second billet comprises one of the plurality of composite powders and the third billet comprise another one of the plurality of the composite powders, and
- wherein the second billet comprises 0.09 to 10 parts by volume of the carbon nanotubes with respect to 100 parts by volume of the aluminum or aluminum alloy powder, and the third billet comprises 0.08 part by volume of the carbon nanotubes with respect to 100 parts by volume of the aluminum or aluminum alloy powder.
Dependencies are inferred from the claim text.