With the development of nanotechnology and advances in coating technology, nano-tool coating materials have also attracted the attention of researchers. There are two main types of nano-coatings: nano-multilayer structures and nano-composite structures. Nano-multilayer coatings generally consist of a high-rise number of structural materials, chemical bonds, and single-layer materials with atomic radii and lattices that are often close together, and may result in a new coating that is significantly different from the performance of the individual coatings that make up it. . This is an artificially controllable one-dimensional periodic structure with alternating deposition of a single layer coating of no more than 5 to 15 nm. Chu and Barnett believe that the high hardness of nano-multilayer coatings is mainly due to the difficulty of movement of layers or interlayer dislocations. When the coating is very thin, the shear modulus between the two layers is different. If the dislocation energy of the interlayer is greatly different, the interlayer dislocation motion is difficult, that is, the energy of the dislocation motion determines the hardness of the superlattice coating. . The structure of the nano-multilayer coating is mainly in three ways: (1) alternating coating of metal nitride nano-layer and metal AlN nano-layer; (2) alternating coating of metal AlN nano-layer and metal AlCN nano-layer; (3) metal nitrogen The nano layer of the compound is alternately coated with the metal AlN nano layer and the metal AlCN nano layer. Other metal elements (such as titanium, tantalum, niobium, vanadium, niobium, zirconium or chromium) may be added during the coating process to further improve the hardness, chemical stability, toughness and oxidation resistance of the coating. Studies have shown that for TiN/AlN nano-multicoating, when the layer thickness is 2~4nm, AlN exhibits cubic NaCl structure, the microhardness of the coating reaches 30~40GPa, and its oxidation temperature reaches 1000°C, using plasma enhanced chemical vapor phase. The deposited AlN/TiAlN nano-multilayer film has high hardness, high adhesion and high wear resistance.
Recovery straps and tow straps are sometimes used interchangeably, but it's important to note that both cannot be used for the same purposes. The main difference between a towing strap and a recovery strap is the fabric and its ability to stretch. These straps are made of a nylon fabrication so they can stretch. A vehicle tow strap is usually made of polyester which stretches less than nylon. A tow strap does just that: tows a vehicle behind another. You'll generally find a tow strap with hooks on each end. Traditional tow straps and chains are similar in their towing applications.
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