To provide a system and a method of producing a niobium-based material part wherein removal of yttria-based cores is relatively rapid and does not adversely affect the quality of the cast part.
A method of removing an yttria-based core (78) from a niobium-based part (50) is disclosed. The method includes the step of bringing the yttria-based core (78) into contact with an effective amount of a composition which comprises at least one acid selected from the group consisting of hydrochloric acid, nitric acid, phosphoric acid, nitric/phosphoric acid, sulfuric acid, and acetic acid. The yttria-based core material (78) is rapidly removed from the niobium-based part (50) and does not adversely affect the properties or surface of the part (50).
COPYRIGHT: (C)2007,JPO&INPIT
KLUG FREDERIC JOSEPH
LYONS ROBERT JOSEPH
MCKIEVER JOAN KATHERINE
| JPH01202337A | 1989-08-15 | |||
| JPH05263178A | 1993-10-12 | |||
| JP2004174598A | 2004-06-24 | |||
| JPH0751794A | 1995-02-28 | |||
| JPH01282120A | 1989-11-14 | |||
| JPS53100926A | 1978-09-02 | |||
| JP2004114060A | 2004-04-15 |
Hirokazu Ogura
Toshihisa Kurokawa
Arakawa Satoshi
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