Structure and Properties of CVD Tungsten Tube Wound by Tungsten Wire

During the preparation of tungsten tube in CVD(Chemical Vapor Deposition) process, in order to improve the strength and toughness of CVD tungsten tube, one or several layers of very fine tungsten wire can be wound on deposition matrix to obtain CVD tungsten tube wound by tungsten wire (the tungsten wire-CVD tungsten composite materials). CVD tungsten tube wound by tungsten wire allows the tungsten tube to change the direction of growth, and the crystal grains will also be refined, so the strength and toughness of CVD tungsten tube is improved.

Because of the presence of tungsten wire, the density and purity of CVD tungsten tube wound by tungsten wire will decline slightly. But it still owns more than 99% of purity; and still has higher density than 19g / cm3

Therefore, CVD tungsten tube wound by tungsten wire owns a high purity and density, a significant increase in crush strength, and fracture morphology of significantly change.


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