Experts from the Russian Central Institute of Materials Science and the Royal Swedish Institute of Technology have jointly developed a new process for the synthesis of diamond parts. The process can synthesize larger and more complex parts with diamond particles as the main raw material without using a high pressure device.
According to the Russian "Scientific Information" magazine, in order to obtain diamond-like parts with good wear resistance and thermal conductivity and complete internal structure, the craftsmen often put industrial diamond particles and carbonized materials with physical properties close to the diamond into the high-pressure device under pressure. The above materials were sintered in an environment of about 8.5 billion Pascals. In this process, the surface material of the diamond particles is converted into graphite, and the graphite can be firmly bonded to the carbonized material by a chemical reaction. However, since the size of the high-pressure device is relatively fixed and the pressure inside the high-pressure device is extremely large, it is impossible to produce a part having a size exceeding the high-pressure device and having a complicated shape.
To solve this problem, Russian and Swedish experts have developed new synthetic processes. The worker first compression-molded the powdered diamond particles to achieve the desired size and shape of the blank formed after compression molding. Thereafter, the billet and liquid silicon are placed in a large vacuum furnace for heating, and the liquid silicon is allowed to penetrate into the diamond billet. During the heating process, the surface of the diamond particles forms a carbon layer similar in chemical properties to graphite. This carbon layer is not only integrated with the diamond particles, but also reacts with liquid silicon to form silicon carbide. After further shaping, the larger and more complex diamond parts can be “furnashedâ€.
According to Russian experts, the diamond-based parts synthesized by the new process are hard and the internal structure is complete and firm. When an external force is encountered, the inside of such a part does not generate stress. In addition, the good thermal conductivity of the part's materials allows the part to adapt to environments with extreme temperature changes.
According to the Russian "Scientific Information" magazine, in order to obtain diamond-like parts with good wear resistance and thermal conductivity and complete internal structure, the craftsmen often put industrial diamond particles and carbonized materials with physical properties close to the diamond into the high-pressure device under pressure. The above materials were sintered in an environment of about 8.5 billion Pascals. In this process, the surface material of the diamond particles is converted into graphite, and the graphite can be firmly bonded to the carbonized material by a chemical reaction. However, since the size of the high-pressure device is relatively fixed and the pressure inside the high-pressure device is extremely large, it is impossible to produce a part having a size exceeding the high-pressure device and having a complicated shape.
To solve this problem, Russian and Swedish experts have developed new synthetic processes. The worker first compression-molded the powdered diamond particles to achieve the desired size and shape of the blank formed after compression molding. Thereafter, the billet and liquid silicon are placed in a large vacuum furnace for heating, and the liquid silicon is allowed to penetrate into the diamond billet. During the heating process, the surface of the diamond particles forms a carbon layer similar in chemical properties to graphite. This carbon layer is not only integrated with the diamond particles, but also reacts with liquid silicon to form silicon carbide. After further shaping, the larger and more complex diamond parts can be “furnashedâ€.
According to Russian experts, the diamond-based parts synthesized by the new process are hard and the internal structure is complete and firm. When an external force is encountered, the inside of such a part does not generate stress. In addition, the good thermal conductivity of the part's materials allows the part to adapt to environments with extreme temperature changes.
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