Diamond lapping

SRV seats must be lapped to a micro finish using special compounds. Prior to super finishing, the valve seats should be lapped flat and to a fine surface finish in accordance with the standard practice as described above A 3- i,m-size diamond lapping compound should be used as described in the following procedure... 

Mono- Versus Polycrystalline Diamond Lapping of Ceramics... 

Mono vs. polycrystalline diamond lapping of ceramics ID PMMC 1703. Acoustic emission monitoring of lapping process ID PMMC 1704. 

Fig. 9 AFM images of (a) a Pt electrode surface freshly polished with 0.1 pm diamond lapping compound and (b) the same Pt electrode after application of power ultrasound in a solution of acetonitrile. Note the difference in scale in (a) 2000 A and (b) 4000 A.

Talib, D., Ma, R., McLeod, C.W., Green, D. (2004) Multielement analysis of modern and ancient coins using diamond lapping film and laser ablation ICP mass spectrometry. Canadian Journal of Analytical Sciences and Spectroscopy, 49(3), 156-165. 

Diamond polishing compounds with diamond lapping films (15, 5,1 pm)... 

Analysis of modern and ancient coins using diamond lapping film Nd YAG 266 nm ICP-Q-MS Quantitative analysis of bronze coins using diamond lapping film for in situ microsampling Talib et al. [49]... 

Here, a small piece of dried material is first impregnated using epoxy resin and cut to a thin slice (of dimensions 1.7 x 1.7 x 0.7 mm ) using a diamond saw with isopropanol as a lubricant. It is thinned down mechanically to a bevel by means of the Tripod method to yield a thickness of about 20-30 pm on the thick side. Diamond lapping film discs of 30, 15, 6, 3, 1 and 0.5 pm are used to progressively reach the final thickness. Isopropanol is used as a lubricant. 

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