منابع مشابه
Beneficial effects of Y2O3 dispersion on Al2O3 protective coating
We have studied the mechanism by which dispersed Y 2 0 3 exerts beneficial effects on the oxidation protection of an A1203 coating (film) on the basis of the following models: 1) Y2O3 suppresses surface segregation of S by trapping it in the alloy matrix and accordingly suppresses spalling of the A1203 film; 2.1) The diffusion of alloying elements into the N2o3 film is retarded by dispersed oxi...
متن کاملSiC protective coating for photovoltaic retinal prosthesis.
OBJECTIVE To evaluate plasma-enhanced, chemically vapor deposited (PECVD) amorphous silicon carbide (α-SiC:H) as a protective coating for retinal prostheses and other implantable devices, and to study their failure mechanisms in vivo. APPROACH Retinal prostheses were implanted in rats sub-retinally for up to 1 year. Degradation of implants was characterized by optical and scanning electron mi...
متن کاملStudies on defects in galvanized coating on steel wire
Causes for deposition of defective galvanized coating (lumpy deposition of coating during hot dip galvanizing) of carbon-steel wire have been investigated. It is established that the lumpy deposition is caused due to segregation of silicon on the surface of steel wire. Due to this change in composition of the steel at surface, the regions get modified and lie in Sandelin hyper reactive zone. Th...
متن کاملImpedance-Based Wireless Sensor Network for Metal-Protective Coating Evaluation
Researchers have been focused on the influences of flowing fluid on the corrosion of bare metals, but there is little emphasis on the degradation of metal-protective coating. Evaluating the metal-protective coating usually uses the Electrochemical Impedance Spectroscopy (EIS) method. EIS is a technique used for evaluating coating permeability or barrier performance based on the electrical imped...
متن کاملLow-Temperature Self-Healing of a Microcapsule-Type Protective Coating
Low-temperature self-healing capabilities are essential for self-healing materials exposed to cold environments. Although low-temperature self-healing concepts have been proposed, there has been no report of a microcapsule-type low-temperature self-healing system wherein the healing ability was demonstrated at low temperature. In this work, low-temperature self-healing of a microcapsule-type pr...
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ژورنال
عنوان ژورنال: YAKUGAKU ZASSHI
سال: 1958
ISSN: 0031-6903,1347-5231
DOI: 10.1248/yakushi1947.78.6_651