Imaging friction tracks on diamond surfaces using reflection electron microscopy (REM)

Wang, Z. L.; Feng, Zhe-Chuan; Field, J. E.

doi:10.1080/01418619108205582

Cited by 20 publications

(4 citation statements)

References 22 publications

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“…With Rutherford Backscattering Spectroscopy, it has been established that a large number of atoms is displaced in the (sub)surface during polishing [12]. Also, Reflection Electron Microscopy of friction tracks has indicated a structural modification or damage of the upper atomic layers [13]. Moreover, during Reflection Electron Energy Loss Spectroscopy experiments, no reflection diffraction pattern could be obtained of a polished f110g surface, whereas a cleaved f111g diamond surface showed a pattern of a perfectly crystalline structure [8,14].…”

Section: Discussion Of Some Experimental Workmentioning

confidence: 99%

Polishing: Mechanically Induced Degradation of Diamond

Bouwelen

1999

phys. stat. sol. (a)

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Section: Discussion Of Some Experimental Workmentioning

confidence: 99%

Polishing: Mechanically Induced Degradation of Diamond

Bouwelen

1999

phys. stat. sol. (a)

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“…Calculations show that this could account for the observed friction, assuming that the asperities undergo a strain of approximately 5%. Although this is far larger than the strain sustainable by bulk diamond, it is feasible that the small volumes affected can accommodate larger strains without fracture [174]. In this way, the surfaces are able to dissipate frictional energy without necessarily suffering permanent damage.…”

Section: Mechanismsmentioning

confidence: 99%

“…In separate research using reflection electron microscopy (REM), Wang et al showed that diamond surfaces exhibit damage at the asperities even at light loads, and for loads in excess of a mean contact pressure of 21 GPa plastic grooving takes place [174]. If energy losses due to adhesion and plastic deformation are included, it makes the losses caused by ratchet mechanisms and asperity vibration as suggested by Samuels and Wilks [173] more reasonable.…”

Section: Mechanismsmentioning

confidence: 99%

The mechanical and strength properties of diamond

Field

2012

Rep. Prog. Phys.

174

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Diamond is an exciting material with many outstanding properties; see, for example Field J E (ed) 1979 The Properties of Diamond (London: Academic) and Field J E (ed) 1992 The Properties of Natural and Synthetic Diamond (London: Academic). It is pre-eminent as a gemstone, an industrial tool and as a material for solid state research. Since natural diamonds grew deep below the Earth's surface before their ejection to mineable levels, they also contain valuable information for geologists. The key to many of diamond's properties is the rigidity of its structure which explains, for example, its exceptional hardness and its high thermal conductivity. Since 1953, it has been possible to grow synthetic diamond. Before then, it was effectively only possible to have natural diamond, with a small number of these found in the vicinity of meteorite impacts. Techniques are now available to grow gem quality synthetic diamonds greater than 1 carat (0.2 g) using high temperatures and pressures (HTHP) similar to those found in nature. However, the costs are high, and the largest commercially available industrial diamonds are about 0.01 carat in weight or about 1 mm in linear dimension. The bulk of synthetic diamonds used industrially are 600 µm or less. Over 75% of diamond used for industrial purposes today is synthetic material. In recent years, there have been two significant developments. The first is the production of composites based on diamond; these materials have a significantly greater toughness than diamond while still maintaining very high hardness and reasonable thermal conductivity. The second is the production at low pressures by metastable growth using chemical vapour deposition techniques. Deposition onto non-diamond substrates was first demonstrated by Spitsyn et al 1981 J. Cryst. Growth 52 219-26 and confirmed by Matsumoto et al 1982 Japan J. Appl. Phys. 21 L183-5. These developments have added further to the versatility of diamond. Two other groups of materials based on carbon, namely the fullerenes and graphines have been identified in recent years and are now the subject of intense research.

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“…Perhaps as a result of this, research on diamond wear has tended to branch into two main areas: low speed frictional sliding experiments -measuring friction with controlled contact and atmospheric conditions [5][6][7][8][9][10][11][12][13] and post-wear analysis which has included studies of the diamond surfaces after polishing and friction experiments [14][15][16][17] and debris analysis [9,11,12,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%