FAQ1. What is the crystal structure of diamond ? 2. What are the properties of synthetic diamond ? 3. How is synthetic diamond manufactured ? 4. What is saw grade diamond ? 5. What ultrahard grade grits are used in grinding wheels ? 7. What is the role of metal covering of ultrahard abrasive grit ? 10. What residues are processed for recovering noble and precious metals ? 1. What is the crystal structure of diamond ? In diamond the carbon atoms are tetrahedrally coordinated:
Structure of diamond The shape of a crystall is controlled by form and habit. {111} octahedral and {100} cube forms predominate in synthetic diamond crystals.
The cubo - octahedral habit performs highest strength and wear resistance under severe machining conditions. 2. What are the properties of synthetic diamonds ? Diamond is the hardest material at present. Synthetic diamond is obtained using high pressure/ high temperature synthesis or chemical vapour deposition. Its main applications are in the tooling industry.
3. How is synthetic diamond manufactured ? The synthetic diamond grit is produced by converting graphite to diamond using high pressure/ high temperature flux ? growth, direct transformation or shock wave methods. The control of nucleation and growth processes determines the diamond physical properties.
4. What is saw grade diamond ? Diamond powders ranging from 80 mesh upward are commonly called "saw grit". Synthetic diamond saw grit produced by Dacia can be classified as follows: saw grade diamonds for high temperature metal bonds (ST series), medium temperature metal bonds (T series), low temperature metal bonds (MT series), low temperature and electroplated metal bonds (R series). They differ from each other by their toughness and shape. Saw grade diamond tools are recommended for sawing, drilling, grinding, polishing of granite, marble, concrete, asphalt, refractories.
High quality diamond saw grit.
Dacia has developed diamond and cubic boron nitride abrasives used in precision grinding, honing and polishing. The diamond grit (M series for metal and electroplated bonds, FM series for resin bonds) is used for the machining of non-ferrous materials. The cubic boron nitride (ACB-S series) is used for grinding and honing tools for the machining of hard ferrous alloys. These products are generally available from 60/ 80 mesh down to 325/ 400 mesh.
Diamond grinding grit.
6. What is ACUBOR ? Cubic boron nitride is especially used in tooling of hard ferrous materials. The performances of cubic boron nitride tools are superior over diamond and conventional abrasives (silicon carbide and aluminium oxide) in precision grinding at high material removal rates working conditions.
The nickel or copper cladding up to 60% of the total diamond or cubic boron nitride particle weight is used in resin bonds. The effect of the thick metal layer is to improve the retension of particles and to dissipate the heat generated during grinding processes.
8. What is CDF ?
Electroplated diamond sheets and discs for processing of building materials, natural stones, glass, ceramics, composites, semiprecious stones. The electroplated nickel layer incorporating the diamond grit is deposited on various pliant supports like cooper cladded, steel or polyvinyl chloride sheets.
10. What residues are processed for recovering noble and precious metals ?
|
