A team of international scientists has reported on a new type of super-hard material recently, a compound based on tungsten boride, that can be used in drilling, mechanical manufacturing and other fields. It is proved that the new type of tungsten boride has better performance than the hard tungsten carbide cobalt composite and artificial diamond materials which are widely used at present.
Superhard materials are widely used in drilling, machinery manufacturing, metal processing, defense industry, medicine and other fields. Diamonds, while having the highest hardness, are a relatively rare and expensive material, and even artificial diamonds can be prohibitively expensive for many applications. So, for the past 80 years, its competitor, the stellite carbide drill, has maintained its dominant position in the market with unparalleled cost performance.
Tungsten boride is a black or gray hexahedral crystalline powder with high hardness and is often used as a wear-resistant coating and semiconductor film for wear-resistant parts. Due to the difficulty in synthesis, there have been few reports and applications of tungsten boride at home and abroad.
Tungsten carbide materials have been used for decades to make drill bits, including drill bits, including perforators, a drilling tool similar to a piercing bullet. These rigid materials require either high pressure synthesis or much lower fracture toughness. In short, they need at least two hard indicators, namely hardness and toughness.
As is known to all, hard and tough is mutual restriction of the two inter-opposite parameters in metal, low hardness, high tenacity, brittle material is easy broken, therefore, is to find a balance of two parameters is scientists over the years dedicated to research object, scientists use USPEX WB5 evolution algorithm is a kind of new material, the material can be under ordinary conditions of synthesis, and can successfully make the drill bit in two the most important parameters - forming balance between hardness and fracture toughness. Compared with tungsten carbide cobalt drill, tungsten boride is 50% higher and 20% lower respectively. New materials are previously unknown compounds and are readily available under normal conditions. The new material is currently being tested in a large Russian project and is expected to be a new material for drilling applications.
Interestingly, the new material discovered by the team of scientists was confirmed by the simulation synthesis of supercomputer systems. They have tried a lot of materials before and fed them into computer systems to predict and calculate their performance. The new substance was eventually discovered in a sea of change. Anyhow "tungsten boron system has been the subject of many experimental and theoretical study, but they are newly discovered this tungsten boron compounds until now has not been found, this is really surprising, it is conditional and dominated nearly a century of tungsten carbide cobalt alloy material competition?
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