This module introduces the students to polycrystalline diamond (PCD) composites and related materials, high pressure-high temperature synthesis and the importance of defects. The machining characteristics of PCD will be discussed along with tool fabrication, machining trials, wear and failure mechanisms.
Principal Learning Outcomes:
- Introduction to polycrystalline diamond (PCD)
- High Pressure/Temperature Synthesis of PCD - Process Model – Conventional PCD/Hard metal Substrate
- PCD Models related to “defects” in PCD material: Interfacial Grain Growth, - Plumes, - “Soft Spots”
- The Machining Characteristics of PCD, tool fabrication, methods of making machining trials, wear and failure mechanisms
- Cutting Using Diamond Materials: Rock Drilling and the basics of the diamond cutter and the twist drill versus the roller cone
- Advanced Materials Machining: Why and how diamond is used.
- Diamond Grits for lapping, grinding and polishing –functionising diamond materials
- Polycrystalline cubic boron nitride (PCBN) – The differences between PCD and PCBN, applications
- The challenges facing polycrystalline diamond materials – what would we like to solve