| Outer surface of the membrane technology has made remarkable progress, after last several decades'development. It has been used in industrial automation and gained good economic benefit. However, there are also lots of work pieces which work with the internal face, such as the cylinder engine, pipeline transport, ion accelerator control, artillery tube and so on. These work pieces are always broken down because of wear and tear and corroding on the internal face. The internal surface of the membrane technology becomes a very important means to extend useful life. The reports about the internal surface of the membrane technology are rare. and the technical storage is more less than needs of the work pieces. Therefore the internal face coating technology development is a very urgent task.Our workgroup have done a lot of work on the researching of films deposition on the internal face of deep tubes by AIP (arc ion plating). In this paper, DLC (Diamond-like Carbon) film deposition on inner wall of the deep-hole mould is carried out with arc ion plating. In order to increase the depth of the film in the deep-hole mould, this experiment uses the high temperature permanent-magnet to control the plasma to go into the mould. Then, film thickness, AFM, Raman, hardness etc. are carried out.The results show that the film could be deposited on the internal face of the deep-hole mould by AIP with magnetic field. The film on the internal face is typical DLC film according to Raman; the size and number of large grains decreases, and film thickness reduces as the depth of the hole increases; the film nano-hardness is 12Gpa.The thickness of the film is measured and it shows that depth of film deposition increases. The ratio of depth and diameter could be 2.0 by AIP with single magnet; the ratio of depth and diameter could be 2.5 by AIP with double magnet. Homogeneity of the DLC film has greatly improved by AIP with double magnet, and uniformity of DLC film is 1.8%.
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