The hardest known materials, diamond and cubic boron nitride, are thermodynamically stable only at high pressure and temperature. Chemical vapor deposition and sputtering have offered low-pressure alternatives to the traditional synthetic methods and these techniques have recently been exploited for the production of new super-hard materials such as boron carbonitride and carbon nitride, which could be harder than diamond.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.