Lapping machines, polishing machines, fine grinding and honing machines. We also offer abrasive products and ultrasonic cleaning systems. Our services include contract lapping, contract fine grinding and contract polishing, optical flat reconditioning and lap process development.
Gunpowder is the first physical explosive.Before its discovery, many incendiary and burning devices had been used, including Greek fire.The discovery of gunpowder is attributed to experimentation in Chinese alchemy by Taoists in the pursuit of immortality, and is popularly listed as one of the "Four Great Inventions" of China.
We innovate, develop, transfer and standardise and provide specialised services such as Research and Development, Technology Transfer, consultancy and standards and quality to support the scientific and industrial growth and success in the areas of Metals, Minerals and Advanced Materials, by putting our experienced team of scientists and engineers and wealth of state-of-the art technology and ...
2.2. Microstructure. The metallographic samples were prepared using standard metallographic techniques and etched with Glyceregia (15 ml glycerol, 10 ml HCl, and 5 ml HNO 3) for 5–10 s to reveal the general structure of parent metal and with boiling Murakami's reagent (10 g KOH, 10 g potassium ferricyanide, 100 mL water) to reveal δ ferrite and carbides in the weld metal.
Metallographic Etching: Techniques for Metallotraphy, Ceramography, Plastography [Gunter Petzow] on . *FREE* shipping on qualifying offers. An English translation of the 1994 second edition, this book is an outstanding source of etchants of all types