The list below showing 25 active volcanoes in the Philippines was based on the PHIVOLCS list with some included from the GVP. The number is not definite and depends on someone's definition of active or historical timeframe. Descriptions under Eruption were based on the GVP website.
PVD: Process flow diagram. Physical vapor deposition (PVD) describes a variety of vacuum deposition methods which can be used to produce thin films. PVD uses physical process (such as heating or sputtering) to produce a vapor of material, which is then deposited on the object which requires coating.PVD is used in the manufacture of items which require thin films for mechanical, chemical or electronic reasons.nside the Plasma Spray-Physical Vapor Deposition, or PS-PVD, ceramic powder is introduced into the plasma flame, which vaporizes it and then condenses it on the (cooler) workpiece to form the ceramic coating.
Coatings â Below are descriptions of the available metal coatings used in the metal roofing industry. Kynar 500 and Hylar 5000 â are trade names for polyvinylidene (PVDF) paint finishes that provide very strong longevity and durability including fade and chalk resistance that leads the coatings industry.