Effect of the Combination of DLC Film and Alcohol Mist in Turning of Aluminum Alloy

Conventional coating tools have a high affinity for ductile materials, like aluminum alloy, so cutting chips tend to adhere to cutting edge and work material surface. Therefore, chipping is caused, and surface texture is degraded. In order to solve these problems, recently, DLC (Diamond-Like-Carbon) has been applied to coating material. In this research, it is curried out cutting of Aluminum alloy by the use of DLC coating tool, and examined influence of DLC coating conditions on cutting characteristics. So far we have been concerned with the effect of type of hydrocarbon gas (acethylene:C2H2, methane:CH4) on cutting. As a result, it is revealed that cohesion of chips decreases, and surface roughness of work material improves in the case of acethylene-DLC. On the other hand, internal stress is produced by deference in hardness between tool surface and DLC film, and which is considered cause of film peeling [1]. Therefore, we examined interlayer between DLC film and tool surface in order to relax of internal stress. As a result, it was cleared that Titanium interlayer excels in adhesion.

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Performance Evaluation of DLC Film Sliding Against Aluminum Alloy in Air Atmosphere

The Proceedings of Conference of Hokuriku-Shinetsu Branch ◽

10.1299/jsmehs.2004.41.141 ◽

2004 ◽

Vol 2004.41 (0) ◽

pp. 141-142

Author(s):

Yoshio HARUYAMA ◽

Takeshi KIMATA ◽

Manabu YASUOKA ◽

Noriyo HORIKAWA

Keyword(s):

Aluminum Alloy ◽

Performance Evaluation ◽

Dlc Film ◽

Air Atmosphere

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Effect of the fluorination of DLC film on the corrosion protection of aluminum alloy (AA 5052)

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2010.03.055 ◽

2010 ◽

Vol 204 (18-19) ◽

pp. 3022-3028 ◽

Cited By ~ 20

Author(s):

R.C.C. Rangel ◽

M.E.P. Souza ◽

W.H. Schreiner ◽

C.M.A. Freire ◽

E.C. Rangel ◽

...

Keyword(s):

Aluminum Alloy ◽

Corrosion Protection ◽

Dlc Film

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Surface Modification of Aluminum Alloy Using Plasma Based Ion Implantation and Deposition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.488-489.960 ◽

2012 ◽

Vol 488-489 ◽

pp. 960-966 ◽

Cited By ~ 1

Author(s):

Tadahiro Wada ◽

Jun Nakanishi ◽

Yasuhiro Miki ◽

Makoto Asano ◽

Koji Iwamoto ◽

...

Keyword(s):

Wear Resistance ◽

Surface Modification ◽

Aluminum Alloy ◽

Aluminum Alloys ◽

Multilayer Coating ◽

Frictional Coefficient ◽

Negative Influence ◽

Dlc Film ◽

Mechanical Parts ◽

Silicon Based

Aluminum alloys are used for mechanical parts, but the alloys have poor wear-resistance. To increase their wear resistance, a hard coating is applied to the surface of the alloys. Diamond-like carbon (DLC) is applied in surface modification technology due to its superior mechanical characteristics. In this study, in order to achieve effective surface modification to improve the wear resistance of the aluminum alloys, a new coatings-system was designed. This coating-substrate system is a multilayer coating-substrate system, which consists of nitriding pretreatment of the substrate, the intermediate layer of the silicon-based film and the outer layer of the DLC film. This new coating-system was used to deposit DLC film on three kinds of aluminum alloys that have different Si contents. In order to determine the influence of the Si contents on the mechanical properties of the DLC film, SEM observation of the cross section of the coating layer, the adhesion and the wear resistance of the layer were experimentally investigated. The results were as follows: (1) In the case of the DLC un-coated aluminum alloys, the rapid progress of the friction coefficient in the case of 10-N load was found at the short sliding distance. (2) The hardness of the DLC film was not decreased with the increase of Si contents. And the increase of Si contents did not have a negative influence upon the hardness of the DLC film. (3) The frictional coefficient of the Al-4%Si alloy was the smallest, the frictional coefficient of the DLC film was decreased with the increase of Si contents, and it was effective for improvement of the frictional coefficient to increase Si contents. The new coating-substrate system is effective for improving the adhesion between the substrate of the aluminum alloy and the DLC film. Moreover, the increase of Si contents was effective for the decrease in the frictional coefficient.

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Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100065079 ◽

1971 ◽

Vol 29 ◽

pp. 204-205

Author(s):

G. G. Shaw

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Aluminum Alloy ◽

Electron Beam ◽

Pure Aluminum ◽

Ion Milling ◽

Transmission Electron ◽

Fiber Matrix ◽

Ion Erosion ◽

Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

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