In this paper, by R. Mikaeil, M. Ataei and S. H. Hoseinie, the prediction of production rate of diamond wire saws was investigated. Performance measurements of diamond wire saws were carried out in ...
UTFPR (Universidade Tecnologica Federal do Parana) Academic Department of Civil Construction, Curitiba, PR
This paper by S. Trpkovski et al reports on various techniques for integrating Microwave Plasma Chemical Vapour Deposition (MPCVD) nanocrystalline diamond with photonic devices. MPCVD diamond incorporating nickel defects has been grown on the end facets of optical fibres. Single photon emission with a wavelength of approximately 800 nm has been measured from these nickel defects. These diamond-based single photon sources have the potential to be used in numerous applications including Quantum Key Distribution. In addition, the growth of MPCVD diamond on the end facets of titanium-diffused LiNbO3 waveguides is also being investigated. The capability to integrate high-speed, low-loss LiNbO3 with MPCVD diamond offers an exceptionally flexible platform for practical quantum optical devices. Furthermore, research is currently being undertaken into the fabrication of optical waveguide structures in MPCVD nanocrystalline diamond thin-films. These diamond films have been grown on silica-coated silicon wafers and patterned by both Reactive Ion Etching and Focused Ion Beam milling to construct optical waveguide structures.
There are several defects in electrodeposited diamond tools such as nodules, over-plating and valleys. This paper by Y. Li, A. Zhao, Z. Huang, H. Lu and Y. Wang, presents their appearance, harms, causes and potential solutions. It is shown that nodules, with domed shape, are always attached to diamond grains while valleys, with irregular shape, tend to accompany nodules or over-plating. These defects are aggravated by increase in the number of 'troublesome' (tending to cause the defects) diamond grains, current density and deposit thickness. All the facts are supposed to arise from magnetization of metallic inclusions trapped in diamond. With the assistance of electromagnetic attracting force (exerted by magnetized diamond on moving cations) and current density increase (resulting from diamond occupation), the dispersive and electro-conductive metallic inclusions lead to nodules. As big or gathered nodules grow up and cover the grain fully, over-plating cases appear. The specific observations and convincing explanations are expected to provide an approach to improving electrodeposited diamond tools.
