Applications cutting tools

Sic and a-Sl C, x H RS. ARE, CVD, Plasma CVD, RIBS High temperature High temperature semiconductor structural devices, solar cells applications, cutting tool hard coatings ... 

Chemical vapor deposition (CVD) has grown very rapidly in the last twenty years and applications of this fabrication process are now key elements in many industrial products, such as semiconductors, optoelectronics, optics, cutting tools, refractory fibers, filters and many others. CVD is no longer a laboratory curiosity but a maj or technology on par with other maj or technological disciplines such as electrodeposition, powder metallurgy, or conventional ceramic processing. 

Two maj or areas of application of CVD have rapidly developed in the last twenty years or so, namely in the semiconductor industry and in the so-called metallurgical-coating industry which includes cutting-tool fabrication. CVD technology isparticularly important in the production of semiconductors and related electronic components. Itisby far the most... 

Tungsten carbide is a major industrial material used extensively in cemented carbides for cutting tools. Its main CVD applications are as follows ... 

Experimental TiB2 coatings for cemented carbide cutting tools and other wear- and erosion-resistant applications (pumps, valves, etc.). ]... 

Both CVD and PVD are used extensively in the production of coatings for cutting-tool applications. The PVD processes include mag-... 

Whiskers are short fibers, usually a single crystal with an aspect ratio of 10/1 or greater. They have high strength but are difficult to process. Their applications so far has been limited SiC whiskers are reported as random reinforcement for ceramics and in alumina cutting tools. CVD is a common production method.O Beside SiC, the following whiskers have recently been produced by CVD ... 

Hard coatings for cutting tools and erosion applications. 

Advanced ceramics have a wide range of application (Figure 5.3). In many cases, they do not constitute a final product in themselves, but are assembled into components critical to the successful performance of some other complex system. Commercial applications of advanced ceramics can be seen in cutting tools, engine nozzles, components of turbines and turbochargers, tiles for space vehicles, cylinders to store atomic and chemical waste, gas and oil drilling valves, motor plates and shields, and electrodes for corrosive hquids. 

Uses. Used in various superconductor applications and for cutting tools. Nb steels are very heat resistant. Niobium has a good resistance towards corrosive chemicals even at high temperature it is used in the construction of chemical equipment even if it is not as resistant as tantalum. Nb has a low neutron capture cross-section and it is especially resistant towards liquid sodium corrosion it finds applications in the nuclear industry. Nb is very malleable and easy to shape and may be used in special jewellery this is also because it is possible to give it beautiful colours (thin-film interference colours) by heating in air or, better, by controlled anodization. 

Main uses of the metal. Applications of Ta in medicine (in prosthetic implants) are also well known because of its lack of toxicity and excellent compatibility with tissue. It is used for producing capacitors. Tantalum carbide is used in cutting tools. 

The performance of a tool material in a given application is dictated by its response to conditions at the tool tip. High temperatures and stresses can cause blunting from the plastic deformation of the tool tip, whereas high stresses alone may lead to catastrophic fracture. In addition to plastic deformation and fracture, the service life of cutting tools is determined by a number of wear processes, some of which are shown in Figure 2. 

Brazing is widely used in assembling heat exchangers, piping systems, electrical products, cutting tools, bicycles, and control instruments, among many other applications. 

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