The ablation dominated polymethylmethacrylate arc
نویسندگان
چکیده
منابع مشابه
Material Removal by Arc Ablation
Arc ablation holds the promise of fast, low-cost metal removal at faster rates than laser, plasma and electron-beam methods and without the tooling and fixturing forces of conventional machining. Preliminary results show surface finishes in the tens of microns range at high material removal rates (MRRs) by adaptive control of arc voltage: up to 97 mm3/sec at 4 kW. These results far exceed the c...
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An innovative concept in the development of advanced coating deposition and ion implantation method including an application of filtered DC metal plasma or ablation plasma and highfrequency short-pulsed negative bias voltage with a duty factor in the range 10–99% are considered. It was shown that plasma based ion implantation as well as ion-assisted coating deposition may be realized for metal ...
متن کاملSmoothness of ablation on polymethylmethacrylate plates with four scanning excimer lasers.
PURPOSE To perform a quantitative evaluation of smoothness of ablation on polymethylmethacrylate (PMMA) using four scanning excimer lasers available commercially for photorefractive surgery. METHODS Ablations were done on PMMA plates with dimensions 100 x 50 x 1 mm. Four scanning excimer lasers were used, two with flying spot technology (Zeiss-Meditec MEL-70, and a Russian-made unit, Microsca...
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Macrophages and their fused products are commonly found at the polymethylmethacrylate cementbone interface, but it is not known if they confribute directly to the osteolysis associated with loosening of the cemented prosthesis. We isolated mononuclear phagocytes from granulomas formed by subcutaneous implantation of polymethylmethacrylate into mice and incubated them on bone slices in which the...
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Crack propagation of PMMA in some liquid environments is described for various testing conditions, such as fixed load, fixed displacement and monotonically increasing displacement. Fracture mechanics concepts have been used successfully in analysing the results. When continuous stable cracking is achieved, values of fracture toughness (R) for PMMA under these loading conditions are obtained as ...
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ژورنال
عنوان ژورنال: Journal of Physics D: Applied Physics
سال: 1981
ISSN: 0022-3727
DOI: 10.1088/0022-3727/14/9/520