Is boron carbide harmful to the human body?

Overview of boron carbide B4C powder

Boron carbide B4C powder is an important special ceramic with many excellent properties, commonly known as artificial diamond, and is a kind of boride with high hardness. It does not react with acid-base solution, it is easy to manufacture and the price is relatively cheap. Widely used for grinding, grinding and drilling of hard materials. Boron carbide was first discovered in 1858, and its hardness is second only to diamond and cubic boron nitride in nature, especially its near-constant high temperature hardness (>30GPa) is unmatched by other materials, so it has become super hard. An important member of the material family.

Boron carbide B4C powder has the characteristics of high melting point (2450 ℃), high hardness, high modulus, low density (2.52g/cm3), good wear resistance, strong acid and alkali resistance, good neutron absorption capacity, and low expansion rate. It is widely used in refractory materials, engineering ceramics, nuclear industry, aerospace and other fields. However, boron carbide itself has shortcomings such as low fracture toughness, high sintering temperature, poor oxidation resistance, and poor metal stability, which limit its further application in industry. For further development and research.

Boron carbide is irritating, so long-term close contact requires certain protective measures. For example, avoid inhalation of its dust and direct contact with the skin. If a patient inhales only a small amount of boron carbide powder during exposure, it will not directly cause the body to develop silicosis. Generally speaking, as long as you stay away from the substance at this time, you can still reduce the chance of suffering from silicosis. However, if you continue to inhale the powder, you may gradually cause these toxic irritants to appear in the lungs, where silicosis begins. The hardness of boron carbide is lower than that of industrial diamond, but higher than that of silicon carbide. More brittle than most pottery. Has a larger thermal energy neutron capture cross section. Strong chemical resistance. Not attacked by hot hydrogen fluoride and nitric acid. Soluble in molten alkali, insoluble in water and acid. Relative density (d204) 2.508 ~ 2.512. Melting point 2350 ℃. Boiling point 3500 ℃. Boron carbide can absorb a large number of neutrons without forming any radioactive isotopes. It is an ideal neutron absorber in nuclear power plants. Neutron absorbers mainly control the rate of nuclear fission. Boron carbide is primarily made into controllable rods in nuclear reactors, but is also sometimes powdered to increase surface area.

Application of boron carbide B4C powder

When the Chernobyl nuclear accident occurred in 1986, a front-line aviation regiment in Tozuk, Russia, was all transferred to the east of Chernobyl, and helicopters from Mi-8 to Mi-26 were immediately put into airlift missions. . After running out of boron carbide it will start dropping normal sand again. Flying becomes easier as the descent progresses. After the helicopter dropped nearly 2,000 tons of boron carbide and sand, engineers finally announced that the chain reaction inside the reactor had stopped, and the helicopter eventually carried a total of 5,000 tons. Since boron carbide is a harder solid than silicon carbide or tungsten carbide, it has long been used as a grit abrasive. Due to its high melting point, it is not easy to cast into man-made products, but it can be processed into simple shapes by melting powder at high temperature. It is used for grinding, grinding, drilling and polishing of hard materials such as cemented carbide and precious stones. Boron carbide can also be used as a ceramic coating for warships and helicopters. In the arms industry, it can be used to make muzzles. Boron carbide is also used in the manufacture of metal borides and in the smelting and special welding of sodium boron and boron alloys. It is lightweight and resists penetration of armor-piercing projectiles into a heat-pressed coating to form an integral layer. In the arms industry, it can be used to make muzzles. Boron carbide is also used in the manufacture of metal borides and in the smelting and special welding of sodium boron and boron alloys. It is lightweight and resists penetration of armor-piercing projectiles into a heat-pressed coating to form an integral layer. In the arms industry, it can be used to make muzzles. Boron carbide is also used in the manufacture of metal borides and in the smelting and special welding of sodium boron and boron alloys.

control nuclear fission

Boron carbide can absorb a large number of neutrons without forming any radioactive isotopes. It is an ideal neutron absorber in nuclear power plants. Neutron absorbers mainly control the rate of nuclear fission. Boron carbide is mainly used in nuclear reactors as controllable rods, but is sometimes powdered due to increased surface area.

Abrasives

Because boron carbide has long been used as a rough grinding material. Due to its high melting point, it is not easy to cast into artificial products, but it can be processed into simple shapes by melting powder at high temperature. For grinding, grinding, drilling and polishing of hard materials such as carbide and gemstones.

coating

Boron carbide can also be used as ceramic coatings for warships and helicopters. It is lightweight and has the ability to resist penetration of armor-piercing projectiles through thermocompression coatings, forming a complete defensive layer.

nozzle

In the arms industry, it can be used to make gun barrels. Boron carbide, extremely hard and wear-resistant, does not react with acid and alkali, high and low temperature resistance, high pressure resistance, density ≥2.46g/cm3; microhardness ≥3500kgf/mm2, flexural strength ≥400MPa, melting point 2450℃.

Since boron carbide nozzles have the above-mentioned characteristics of wear resistance and high hardness, boron carbide sandblasting nozzles will gradually replace known cemented carbide/tungsten steel and silicon carbide, silicon nitride, alumina, zirconia and other sandblasting nozzles.

other

Boron carbide is also used in the manufacture of metal borides, smelting sodium boron, boron alloys and special welding.

Boron carbide B4C powder price

The price of boron carbide B4C powder will vary randomly due to factors such as production costs, transportation costs, international conditions, exchange rates, and market supply and demand of boron carbide B4C powder. Tanki New Materials Co.,Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for boron carbide B4C powder, please feel free to send an inquiry to get the latest price of boron carbide B4C powder.

Boron Carbide B4C Powder Supplier

As a global supplier of boron carbide B4C powders, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (titanium diboride, silicon hexaboride, molybdenum boride, iron boride), high-purity target materials, functional ceramics and structural devices, and provides OEM services.