Topic
Blisters
About: Blisters is a research topic. Over the lifetime, 980 publications have been published within this topic receiving 16229 citations.
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TL;DR: In this article, the authors investigated the mechanism of blister formation on the PECVD SiO2/Pt/PZT/Pte capacitor and showed that the accumulation of water-vapor pressure developed by chemical reaction between oxygen and hydrogen could be the dominant mechanism for blister formation.
Abstract: Silicon dioxide was deposited on a Pt/Pb(ZrxTi1−x)O3/Pt capacitor by the plasma-enhanced chemical-vapor deposition (PECVD) method. We have been investigated the mechanism of blister formation on the PECVD SiO2/Pt/PZT/Pt capacitor. The blisters were observed at the temperature of 325 °C in O2 atmosphere, while in N2 and Ar atmosphere blisters were not formed even at 500 °C. Hydrogen evolution analysis from the PECVD SiO2 layer showed a sharp peak near 320 °C. The results indicated that the accumulation of water-vapor pressure developed by chemical reaction between oxygen and hydrogen could be the dominant mechanism of blister formation in PECVD SiO2/Pt/PZT/Pt capacitors.
9 citations
Patent•
07 Jul 2006
TL;DR: In this paper, a pocket roll centered on and rotatable about a respective axis has an outer surface formed with an array of open pockets separated by directed lands, and slip inserts set in at least some of the lands, extend axially of the pocket-roll axis and form in the respective lands axially extending outer-surface regions having coefficients of friction smaller than the coefficient of friction of pocket roll outer surface.
Abstract: A pocket roll centered on and rotatable about a respective axis has an outer surface formed with an array of open pockets separated by directed lands. The pocket-roll outer surface has a predetermined coefficient of friction. A blister foil is fed to the pocket roll with blisters of the blister foil fitting in the pockets. A seal roll rotatable about a respective axis adjacent the pocket roll has an outer surface pressing a cover foil against the blister foil so that the foils are pinched between the rolls. Slip inserts set in at least some of the lands, extend axially of the pocket-roll axis and form in the respective lands axially extending outer-surface regions having coefficients of friction smaller than the coefficient of friction of the pocket-roll outer surface. A position-correcting unit has a sensor and detects and adjusts the positions of the blisters relative to the direction.
9 citations
TL;DR: In this article, the authors observed an increase in the unsupported regions of the films, which, if it results from three dimensional swelling of the film, is two orders of magnitude larger than would be calculated from the total bubble volume as observed by T. E. M.
Abstract: ABSTRACT : Aluminium films 2000 A thick have been bombarded with various flu-ences of 5 keV He+ ions and the resulting bubble distribution observed by Transmission Electron Microscopy. Scanning Electron Microscopy of the films indicates an areal increase in the unsupported regions of the films, which, if it results from three dimensional swelling of the films, is two orders of magnitude larger than would be calculated from the total bubble volume as observed by T. E. M. In addition features closely resembling blisters observed in bulk materials, form on the supported regions of the film. These blisters like features are thought to result from lateral stresses in the films.
9 citations
TL;DR: Levels of creatine kinase and its three isoenzymes in serum and blister fluid from 16 healthy volunteers indicated that the source of BB‐isoenzyme in blister fluid is most probably the damaged epidermis.
Abstract: We measured levels of creatine kinase and its three isoenzymes in serum and blister fluid from 16 healthy volunteers. The BB-isoenzyme was found to be the predominant form in blister fluid while only the MM isoenzyme was found in serum. The levels of BB-isoenzyme in blister fluid decreased as the blisters aged. The source of BB-isoenzyme in blister fluid is most probably the damaged epidermis.
9 citations
TL;DR: In this paper, an experimental study is presented about the environmental conditions and the evolution of blister appearance on the specimen, then the mechanism of their formation and propagation in the material is suggested, and finally an attempt is made to explain the origin of the phenomenon.
Abstract: Blisters were observed in thermoplastic composite materials after a thermal shock during the manufacturing process of electronic parts. The aim of this paper is to describe the blister appearance and its mechanism. First, an experimental study is presented about the environmental conditions and the evolution of blister appearance on the specimen, then the mechanism of their formation and propagation in the material is suggested, and finally an attempt is made to explain the origin of the phenomenon. Experiments show that the water content of the material, the time and the temperature of the thermal shock play an important role. Observations made by SEM show the blister progression in the core of the material. A crack is initiated and then propagates on the interface fiber-matrix. After a crack reaches a sufficient length, the internal stress field opens it and a blister appears.
9 citations