Aluminum base alloy containing boron and manufacturing...

Alloys or metallic compositions – Aluminum base

Reexamination Certificate

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C148S550000, C148S552000, C164S457000

Reexamination Certificate

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07125515

ABSTRACT:
A aluminum base alloy containing boron and manufacturing method thereof, said alloy exhibiting good mechanical properties (such as high-temperature strength and creep strength) over a long period of time and also having a neutron absorbing capacity owing to boron present therein in the form of a compound without segregation. The alloy contains 0.5–10 mass % of boron with an isotopic element satisfying a relation of10B/(10B +11B)≦30%. said boron being present in the form of a boron compound which is 300 μm or below in size. The alloy is obtained by melting at a temperature in excess of 950° C. and cast at a temperature in the range of 800° C. to 950° C., in such a way that the molten metal is kept for 60–180° seconds until it cools from 950° C. to the casting temperature.

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Patent Abstracts of Japan, JP 61-235523, Oct. 20, 1986.
R. R. Burn, Trans. Am. Nucl. Soc., vol. 73, pp. 407-408, “Ford Nuclear Reactor Shim-Safety Rod Replacement”, 1995.

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