Abstract
The use of diamond as a cutting tool is pervasive in modern ultra-high-precision machining applications, particularly for generating sub-micron accurate features through the Single Point Diamond Machining (SPDM) method. Beyond SPDM, diamond is also widely employed in contact profilometry (imaging), nanoindentation, nanoimpact, nanoscratching, and lithography applications.
Interestingly, a specific type of diamond, often found in what is referred to as "supertools" within the fabrication industry, consistently exhibits a significantly longer lifespan—up to 300% greater—than standard diamond tools. Despite this remarkable performance, the reasons behind the enhanced durability of these unique diamond tools have remained unclear.
This paper provides the first experimental explanation for the exceptional properties of exception diamonds referred to as “supertools”. Using Fourier Transform Infrared Spectroscopy (FTIR), we establish that such diamond possesses higher levels of nitrogen Type-A defects. Counterintuitively, they also exhibit lower residual stresses, as revealed through cross-polar examination. Furthermore, Laue backscattering analysis estimated the diamond tip's misalignment error. It was found insignificant in determining diamond tool wear resistance. These findings suggest that the wear resistance of natural diamonds can be predicted by screening for high levels of nitrogen Type-A defects. This insight offers valuable potential for selecting superior diamonds for high-value manufacturing.
Interestingly, a specific type of diamond, often found in what is referred to as "supertools" within the fabrication industry, consistently exhibits a significantly longer lifespan—up to 300% greater—than standard diamond tools. Despite this remarkable performance, the reasons behind the enhanced durability of these unique diamond tools have remained unclear.
This paper provides the first experimental explanation for the exceptional properties of exception diamonds referred to as “supertools”. Using Fourier Transform Infrared Spectroscopy (FTIR), we establish that such diamond possesses higher levels of nitrogen Type-A defects. Counterintuitively, they also exhibit lower residual stresses, as revealed through cross-polar examination. Furthermore, Laue backscattering analysis estimated the diamond tip's misalignment error. It was found insignificant in determining diamond tool wear resistance. These findings suggest that the wear resistance of natural diamonds can be predicted by screening for high levels of nitrogen Type-A defects. This insight offers valuable potential for selecting superior diamonds for high-value manufacturing.
| Original language | English |
|---|---|
| Journal | Diamond and Related Materials |
| Publication status | Accepted/In press - 15 Feb 2025 |
Keywords
- Diamond
- Exceptional life