Title:
ULTRASONIC METAL FINISHING INVOLVING CAVITATIONAL EROSION
Document Type and Number:
WIPO Patent Application WO2001032359
Kind Code:
A3
Abstract:
The present invention provides an improved ultrasonic finishing process and apparatus for finishing a metal article. The method includes cavitationally eroding the metal article to form pits in its external surface. The metal article is also corroded with a corrosion chemical to corrode the pitted metallic surface. In this manner, substantially homogeneously distributed micro-pits can be formed about the article to create a desired matte finish, as well as a surface that is amenable for sealing. In a preferred embodiment, the corrosion chemical is part of a finishing bath containing an alkaline solution that is ultrasonically cavitated for eroding the metal article such as those composed of aluminium.
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Inventors:
MANCHESTER RUSSELL
PFEIFFER KENNETH
TITEL DON
WHEATLEY WAYNE
SHARPE TODD
LIN STEVE
COTTLE HONG YUN WANG
PFEIFFER KENNETH
TITEL DON
WHEATLEY WAYNE
SHARPE TODD
LIN STEVE
COTTLE HONG YUN WANG
Application Number:
PCT/US2000/041763
Publication Date:
December 13, 2001
Filing Date:
October 31, 2000
Export Citation:
Assignee:
APPLIED MATERIALS INC (US)
International Classes:
C23C16/44; C23F1/00; C23F1/36; (IPC1-7): C23F1/36; B08B3/12; C23F1/02; C23F4/00; C23G1/12; C23G3/00
Domestic Patent References:
| WO1993011996A2 | 1993-06-24 |
Foreign References:
| US5600081A | 1997-02-04 | |||
| US4167424A | 1979-09-11 | |||
| US5441062A | 1995-08-15 |
Other References:
DATABASE WPI Section Ch Week 199021, Derwent World Patents Index; Class M14, AN 1990-161429, XP002166894
C.M. COTELL ET AL.: "ASM HANDBOOK, VOL. 5: SURFACE ENGINEERING", 1994, ASM INTERNATIONAL, MATERIALS PARK, OHIO, USA, XP002166893
DATABASE WPI Section Ch Week 198632, Derwent World Patents Index; Class M14, AN 1986-207972, XP002166895
C.M. COTELL ET AL.: "ASM HANDBOOK, VOL. 5: SURFACE ENGINEERING", 1994, ASM INTERNATIONAL, MATERIALS PARK, OHIO, USA, XP002166893
DATABASE WPI Section Ch Week 198632, Derwent World Patents Index; Class M14, AN 1986-207972, XP002166895
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