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  • Titanium nitride (TiN) (sometimes known as “Tinite” or “TiNite” or “TiN”) is an extremely hard ceramic material, often used as a coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.
  • Titanium nitride is a chemical compound of the two elements titanium and nitrogen. TiN - so its formula - is a metallic hard material of typically gold-yellow color.
  • TiN is used to harden and protect cutting and sliding surfaces, for decorative purposes (due to its gold appearance), and as a non-toxic exterior for medical implants. In most applications a coating of less than 5 micrometres (0.00020 in) is applied.
  • TiN will oxidize at 800 °C at normal atmosphere. It is chemically stable at room temperature and is attacked by hot concentrated acids.
  • TiN has excellent infrared (IR) reflectivity properties, reflecting in a spectrum similar to elemental gold (Au), which gives it a yellowish color.
  • The most common use for TiN coating is for edge retention and corrosion resistance on machine tooling, such as drill bits and milling cutters, often improving their lifetime by a factor of three or more.
  • TiN is used in numerous medical (implants, surgical instruments, etc) and food processing applications.
  • TiN is also widely used as a top-layer coating, usually with nickel (Ni) or chromium (Cr) plated substrates, on consumer plumbing fixtures and door hardware.
  • TiN is non-toxic, meets FDA guidelines and has seen use in medical devices such as scalpel blades and orthopedic bone saw blades where sharpness and edge retention are important and bio-implants, as well as aerospace and military applications.
  • As a coating TiN is also used to protect the sliding surfaces of suspension forks of bicycles and motorcycles as well as the shock shafts of radio controlled cars.
  • Titanium nitride powder was formed by heating the carbon-coated titanium dioxide particles in the reactor to a temperature of about 1,450.degree. C. for two hours under nitrogen gas flowing at a rate of about one liter per minute.
  • Titanium nitride coatings can also be deposited by thermal spraying whereas TiN powders are produced by nitridation of titanium with nitrogen or ammonia at 1200 °C.
  • TiN layers are also sputtered on a variety of higher melting point materials such as stainless steels, titanium and titanium alloys.
  • Titanium Nitride (TiN) is the most common PVD hard coating in use today. TiN has an excellent combination of performance properties, attractive appearance, and safety.
  • Titanium nitride (TIN) has been used in the coating of tool steels since the mid-sixties. The reasons to coat cutting tools in a production situation are to increase tool life, to improve thesurface quality of the product, and to increase the production rate.
  • The advantages of TiN coating include high hardness and adhesion, good ductility, excellent lubricity, high chemical
    stability and tough resistance to wear, corrosion and temperature.

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