coating porosity
31Leather — For other uses, see Leather (disambiguation). Modern leather working tools Leather is a durable and flexible material created via the tanning of putrescible animal rawhide and skin, primarily cattlehide. It can be produced through different… …
32Metal — This article is about metallic materials. For other uses, see Metal (disambiguation). Some metal pieces Metals Alkali metals …
33Vacuum pump — A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The vacuum pump was invented in 1650 by Otto von Guericke. Types Pumps can be broadly categorized according to three… …
34Nondestructive testing — or Non destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage.[1] The terms Nondestructive examination (NDE),… …
35art conservation and restoration — Maintenance and preservation of works of art, their protection from future damage, deterioration, or neglect, and the repair or renovation of works that have deteriorated or been damaged. Research in art history has relied heavily on 20th and… …
36arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
37Dye penetrant inspection — 1. Section of material with a surface breaking crack that is not visible to the naked eye. 2. Penetrant is applied to the surface. 3. Excess penetrant is removed. 4. Developer is applied, rendering the crack visible. Dye penetrant inspection… …
38High speed steel — (often abbreviated HSS, sometimes HS) is a material usually used in the manufacture of machine tool bits and other cutters. It is often used in power saw blades and drill bits. It is superior to the older high carbon steel tools used extensively… …
39Plasma Spray — Plasma spraying, a method of thermal spraying, is a materials processing technique for producing coatings and free standing parts using a plasma jet. Deposits having thickness from micrometers to several millimeters can be produced from a variety …
40William C. Pfefferle — (born Philadelphia, Pennsylvania) is an American scientist and inventor. Nicknamed the father of catalytic combustion, he invented the original catalytic combustor for gas turbine engines in the early 1970s. Gas turbines work by mixing fuel with… …
