Mitsubishi Materials. has filed a patent for an aluminum powder mixture that includes a starting material powder and an aluminum alloy powder with specific compositions. This mixture accelerates sintering among aluminum powders, resulting in a higher density, electrical conductivity, and thermal conductivity in the aluminum sintered body. GlobalData’s report on Mitsubishi Materials gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Mitsubishi Materials, Ceramic membrane fuel cells was a key innovation area identified from patents. Mitsubishi Materials's grant share as of January 2024 was 31%. Grant share is based on the ratio of number of grants to total number of patents.

Aluminum powder mixture for high-density sintered bodies

Source: United States Patent and Trademark Office (USPTO). Credit: Mitsubishi Materials Corp

A patent application (Publication Number: US20240033819A1) discloses an aluminum powder mixture designed for use in powder metallurgy and metal additive manufacturing processes. The mixture includes a starting material powder of pure aluminum or an aluminum alloy, combined with an aluminum alloy powder containing specific compositions of Si, Cu, and Mg. The aluminum alloy powder has a lower melting point than the starting material, creating a difference of at least 40°C. The mixture's oxygen concentration is limited to 1.0% by mass or less, and the volume median diameter (D50) of both powders ranges from 12 µm to 50 µm.

The patent also outlines methods for producing aluminum sintered bodies using the described powder mixture. These methods involve sintering the raw material powder in a vacuum, reducing, or inert gas atmosphere at temperatures between 580°C and 650°C. By following these methods, aluminum sintered bodies with a relative density of 85% or more and a thermal conductivity of 160 W/mK or more can be achieved. Additionally, the aluminum alloy powder may contain up to 1.0% by mass of Bi. The patent aims to provide a precise composition and production process for creating high-quality aluminum sintered bodies with improved properties for various industrial applications.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies