June Technical Progress and Statement of Funds Report
Abstract
We have conducted careful XRD analysis, which shows that most of the diamond compacts made to-date may contain as much as 5-10% of a non-diamond (possibly graphitic) phase. Electrical resistivity measurements reveals low values, indicating that the diamond particles are perhaps uniformly held together by a skeleton of the non-diamond phase. We continue to perform shock compaction experiments on various types of pre-treated natural and synthetic diamond powders packed at high initial green densities (> 73% TMD). In the last experiment performed in mid-May, using our 12-capsule plate-impact assembly (at 1.85 km/s velocity), we were able to recover eleven well-consolidated single- piece diamond compacts. The final density of all of these compacts is about 3.3 g/cc. We are currently performing XRD analysis and electrical resistivity measurements on these samples, before they are sent for Raman analysis and thermal conductivity measurements. TEM analysis is also being performed to identify possible deformation substructures in diamond particle interiors, and possible non-diamond phases at interparticle regions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 1992
- Accession Number
- ADA252311
Entities
Organizations
- New Mexico Institute of Mining and Technology