Method of preparing on amorphous aluminum-chromium based alloy
AssigneeSumitomo Electric Industries, Ltd.
InventorsKojiro Kobayashi, Yoshinobu Takeda
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Abstract
An aluminum-chromium based alloy which has a high strength, an excellent heat resistance, corrosion resistance, and a light weight contains 10 to 25 atomic percent of Cr and 0.1 to 5.0 atomic percent of Fe and/or Ni. The total content of Cr, and Fe and/or Ni is not more than 30 atomic percent The remainder substantially consists of aluminum. The aluminum-chromium based alloy partially or entirely exhibits and amorphous state by X-ray diffraction. This aluminum-chromium based alloy is obtained by first preparing a powder by a rapid solidification method, then converting the powder raw material to an amorphous powder by performing a mechanical grinding treatment thereon, and then hot working the amorphous powder.
Claims8
A method of preparing an aluminum-chromium based alloy containing 10 to 25 atomic percent of Cr and 0.1 to 5.0 atomic percent of at least one element selected from a group consisting of Fe and Ni, wherein the total content of said Cr and said at least one element is not more than 30 atomic percent, and a remainder substantially consisting of aluminum.
A method of preparing an aluminum-chromium based alloy containing 10 to 25 atomic percent of Cr and 0.1 to 5.0 atomic percent of at least one element selected from a group consisting of Fe and Ni, wherein the total content of said Cr and said at least one element is not more than 30 atomic percent, and a remainder substantially consisting of aluminum, said method comprising the steps of:
- obtaining an aluminum-chromium binary system alloy powder from a melt of an aluminum-chromium binary system alloy by a rapid solidification method, and alloying any remaining elements other than aluminum and chromium in said aluminum-chromium binary system alloy powder by a mechanical alloying method.
A method of preparing an aluminum-chromium based alloy containing 10 to 25 atomic percent of Cr and 0.1 to 5.0 atomic percent of at least one element selected from a group consisting of Fe and Ni, wherein the total content of said Cr and said at least one element is not more than 30 atomic percent, and a remainder substantially consisting of aluminum, said method comprising the steps of:
- obtaining a crystalline powder by alloying industrial pure aluminum powder, pure chromium or an aluminum mother alloy containing chromium, and remaining elements other than aluminum and chromium or mother alloys of said elements, by a mechanical alloying method, partially or entirely converting said crystalline powder to an amorphous state by a thermal activation annealing treatment to provide an amorphous powder, and hot working said amorphous powder.
Dependencies are inferred from the claim text.