|  | | Elimination of defects and homogenisation of brazed joints in diamond cutting tools to prevent diamind drag during use (eg. diamond saws) |
Diamond ToolsHOT ISOSTATIC PRESSING OFFERS THE POSSIBILITY TO ELIMINATE FAILURES LIKE POROSITY AND TO HOMENGENISE MATERIALS OR COMPOSITES AND THEIR PROPERTIES.
This is important for composites e.g. mixtures from diamonds and metallic matrices which are used under high stresses and conditions.
The aim of HIP is to prevent that the harder phases like diamonds breaking off the metallic matrix during machining.
Principle
A metal matrix composite (MMC) is a consolidated mixture of powders from different materials.
Such material permits the combination of different properties in a novel material which cannot be manufactured by other means.
For example, the wear resistance of diamond tools can be improved by mixing the matrix metallic powders with a higher volume content of diamonds.
Many combinations of particle size, distribution and shape are possible.
Advantages
HIP improves the chemical and mechanical bonding of the diamond phase in the metal matrix, thus improving material properties.
There is less variability in such material properties.
This is an advantage for the calculation of lifetime of large diamond tools like saws of over 2000 mm in diameter:
- Easier maintenance
- Longer maintenance intervals
- Less catastrophic breakdowns
Applications
Quarrying
Concrete buildings
Mining
Glass cutting
Ceramic manufacture
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