The most common of these thin-film vacuum coating processes include evaporation (e.g., using a cathodic arc or thermal technique), ion beam deposition, and sputtering (e.g., using plasmas). All PVD coating processes must occur inside a vacuum chamber so that the vaporized materials do not react with any atmospheric contaminants that could interfere with the microscopic layer of coating, or with the adhesion of the growing thin film to the substrate.
In a recent survey, the UK’s National Chemical Emergency Centre (NCEC) asked its clients and stakeholders whether they or their employees were concerned about the risk that nanomaterials may pose to their workforce. Almost a quarter of responders to the question replied that they were.
Successful ceramic manufacturing requires the correct identification of phases and an understanding of microstructure in starting powders and finished products.
May 1, 2017
Powder X-ray diffraction (XRD) techniques can trace their origin to the pioneering work of Debye and Scherrer in Europe (1916) and Hull in the U.S. (1917).1 Their results dispelled the belief that grinding a single crystal to a powder would destroy crystallinity.
Using five ingredients (silicon, boron, carbon, nitrogen and hydrogen), Gurpreet Singh, the Harold O. and Jane C. Massey Neff associate professor of mechanical and nuclear engineering at Kansas State University, has created a liquid polymer that can transform into a ceramic with valuable thermal, optical, and electronic properties.
The ceramic powder market is facing the same old challenges as it directly follows the demand for ceramic parts. Market pressures include the increasing use of plastics, glass, intermetallics and newer alloys.
For several decades, the use of glass fiber reinforced thermoplastic (GFRT) composites by the automotive industry has been steadily increasing for standard performance applications.1 The values that GFRTs bring include intrinsically high specific stiffness, low cost, and the ability to produce parts quickly with minimal manufacturing complexity.
Zirconium dioxide (ZrO2, also known as zirconia) is a versatile material in the ceramic industry, serving many uses due to its high hardness, chemical resistance, and unique electronic and optical properties. Compared to other ceramics, zirconia has higher compressive and flexural strength. These features are desirable for the foundry, refractories and electronics industries, among others, with a diverse set of end uses.