Roughening and removal of surface contamination from beryllium using negative transferred-arc cleaning
- Los Alamos National Lab., NM (United States). Materials Science and Technology Div.
Negative transferred-arc (TA) cleaning has been used extensively in the aerospace industry to clean and prepare surfaces prior to plasma spraying of thermal barrier coatings. This non-line of sight process can improve the bond strength of plasma sprayed coatings to the substrate material by cleaning and macroscopically roughening the surface. A variation of this cleaning methodology is also used in gas tungsten arc (GTA) welding to cathodically clean the surfaces of aluminum and magnesium prior to welding. Investigations are currently being performed to quantify the degree in which the negative transferred-arc process can clean and roughen metal surfaces. Preliminary information will be reported on the influence of processing conditions on roughening and the removal of carbon and other contaminates from the surface of beryllium. Optical, spectral and electrical methods to quantify cleaning of the surface will also be discussed. Applications for this technology include chemical-free precision cleaning of beryllium components.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 555544
- Report Number(s):
- LA-UR-97-3276; CONF-970992-; ON: DE98001329; TRN: AHC29802%%129
- Resource Relation:
- Conference: 1. international symposium on applied plasma science, Los Angeles, CA (United States), 22-26 Sep 1997; Other Information: PBD: [1997]
- Country of Publication:
- United States
- Language:
- English
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