How to cut silicon carbide ceramics and what can be used to cut silicon carbide ceramics

The laser method can be cut, and the characteristics of laser cutting are: the cutting width is narrow, and the curve cutting can be carried out, but the thickness of the cutting is limited to a certain extent, that is to say, it cannot be cut too thick. Knife cutting belongs to the consolidation cutting method, which is generally various types of manual cutting machines and diamonds.

Saw blades. The bricks are manually pushed under the diamond saw blade through a guide rail on the working plane of the cutting machine. The diamond wire cutting machine can cut silicon carbide ceramics with fast cutting speed and high flatness.

Silicon carbide has no melting point and can only be sublimated. Only materials that are harder than silicon carbide and resistant to high temperatures can only be used. But I don't have the practice of this yet. Metal cutting is easy to solve! Silicon carbide products rely on impact to break the wafer! I don't know what other quality requirements there are?

Silicon carbide has no melting point and can only be sublimated. Only materials that are harder than silicon carbide and resistant to high temperatures can only be used. But I don't have the practice of this yet. Metal cutting is easy to solve! Silicon carbide products rely on impact to break the wafer! I don't know what other quality requirements there are?

The Taizhou Jinke diamond wire cutting machine can cut silicon carbide ceramics with fast cutting speed and high flatness.

Do you mean wire EDM to process ceramics? No, the material must be made that can conduct electricity.

1.The resin cutting disc is made of resin as a binding agent, combined with a variety of materials, and the cutting performance is particularly significant for difficult-to-cut materials such as alloy steel and stainless steel. Dry and wet cutting methods make the cutting accuracy more stable, and at the same time, the selection of the material and hardness of the cutting disc can greatly improve your cutting efficiency and save your production costs.

2.Diamond cutting disc is a kind of cutting tool, which is widely used in the processing of hard and brittle materials such as stone, concrete, prefabricated slabs, new and old roads, ceramics, etc. The diamond cutting disc is mainly composed of two parts; Base body and bit.

The base body is the main supporting part of the bonded cutter head, and the cutter head is the part that cuts in the process of use, the cutter head will be continuously consumed in use, and the matrix will not, the reason why the cutter head can play the role of cutting is because it contains diamond, diamond as the hardest substance at present, it rubs and cuts the processed object in the cutter head. The diamond particles, on the other hand, are encased in metal inside the cutter head.

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Hello, glad to answer for you. Silicon carbide Tao Xiang cave leakage porcelain cutting: the hardness of silicon carbide is, the hardness of diamond is ten, silicon carbide cutting should be made of carbide silicon emery into abrasives for cutting, and high hardness can also be used with diamond saw blades.

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Silicon carbide (SiC) is a material with a high degree of hardness, so it requires the use of appropriate cutting tools and methods during the cutting process. Here are some commonly used silicon carbide cutting methods:

Diamond wire sawing: A diamond wire saw is a common cutting tool that can be used to cut silicon carbide wafers. The diamond particles of a diamond wire saw are capable of cutting on hard surfaces of silicon carbide.

During the cutting process, the wafer is conveyed through a diamond wire saw that is coated with abrasives, which help to weaken the structure of the carbon ruler state Xiaohua silicon, making it easier to cut.

Pulsed laser cutting: Pulsed laser cutting uses a laser beam to cut silicon carbide. The high energy density of the laser can create a thermal effect on the silicon carbide, causing the material to expand violently and crack, resulting in a cut.

Recommend Tianjin Meiman large energy laser tomb manuscript machine. The pulse duration is 22ns, the peak power reaches 2mJ, the beam quality is less, and the incision is only 200 microns. Achieve higher cutting speeds and smoother cutting surfaces for finer cuts and avoid micro-cracks and thermal stresses.

Ion beam cutting: Ion beam cutting utilizes a high-energy ion beam to cut on silicon carbide. Ion beams can form microscopic cracks on the surface of silicon carbide and cause material to peel.

Electrical discharge machining (EDM): Electrical discharge cutting uses electrical discharge to cut hard materials, including silicon carbide. The electrical spark discharge between the electrode and the tracer workpiece can corrode the surface of the material and enable the cut.

Diamond knife cutting: In some cases, special diamond knives can be used to cut silicon carbide. Diamond is a very hard material that is capable of cutting silicon carbide.

Regardless of the cutting method used, it needs to be selected according to the specific cutting requirements and material properties. Cutting parameters need to be controlled during the cutting process to avoid overheating, material cracking, or other undesirable effects. At the same time, in order to ensure the quality of silicon carbide parts after cutting, cutting tools and equipment need to be maintained and calibrated.

There are several methods that can be considered for silicon carbide cutting:

1. Drilling and wire sawing: use a drilling machine with a drill bit to pre-drill holes, and then use wire saws or thin disc saws to cut.

2. Laser cutting: Laser cutting is a high-precision, non-contact cutting method. Cutting is achieved by focusing a high-energy laser on the silicon carbide, allowing it to heat up quickly and melt the beam before rolling.

3. Grinding: Oak Qing uses diamond grinding heads or other superhard abrasives for grinding and cutting, which is a commonly used means. Silicon carbide has a high hardness and requires the use of sufficient coolant to prevent overheating during grinding.

Ceramic products are a relatively exquisite craft, which has been used in our lives in many places. It is a high-tech product, which needs to go through layers of inspection before it can enter our eyes. Let's talk about how to make Zen laughterSilicon carbide ceramic, and what are the advantages of this type of product.

1. How to make silicon carbide ceramics?

1. Ceramic products are relatively fragile, so we choose more sophisticated processes to improve this shortcoming. The results show that the use of B and C as additives alone does not help to fully densify SiC ceramics.

Only when B and C are added at the same time can the high density of SiC ceramics be realized. For the dense sintering of SiC, the specific surface area of SiC powder should be more than 10 m2 g and the oxygen content should be as low as possible.

2. We are a product that has been obtained by hot pressing and sintering. So the comparison is durable. In the mid-50s, some researchers used Al2O3 as an additive, and some researchers used B4C, B or B and C, Al2O3 and C, Al2O3 and Y2O3, Be, B4C and C as additives, and used hot pressing sintering to obtain dense SiC ceramics.

3. We have to go through layers of processes to achieve hot isostatic sintering. With the advent of scientific and technological products, in order to further improve the mechanical properties of SiC ceramics, researchers have carried out research on the hot isostatic pressing process of SiC ceramics. In 1900, a high-density SiC sintered body was obtained.

Furthermore, through this process, the dense sintering of additive-free SiC ceramics was successfully achieved at pressures of 2000 and 138MPa.

2. What are the advantages of silicon carbide ceramics?

1. Our advantage is reflected in the fact that the limit speed is higher and it will not be particularly laborious: ceramics are lighter than steel, which is suitable for large-scale product applications. The centrifugal force is reduced, and the ultimate speed is increased with the same accuracy.

High-precision occasions: The hardness and Young's modulus of ceramics are higher than those of steel, and the mechanical deformation is smaller under the same load, so that it can be used in more precise occasions.

2. Our products can be durable, and will not fail frequently. It can be extended by up to 5 times compared with steel bearings, the centrifugal force of the bearing operation is reduced, the raceway load is reduced, and because the friction coefficient of ceramics is smaller than that of steel, it can reduce the operating temperature rise, reduce friction and prolong the life of the raceway.

Since the coefficient of thermal expansion of ceramics is smaller than that of steel, the clearance of ceramic bearings is less affected by temperature changes than steel bearings, so they can be used over a wider range of temperature fluctuations.

Methods for manufacturing silicon carbide ceramics: pressureless sintering, hot pressure sintering, hot isostatic pressure sintering, reaction sintering, etc. In the preparation of raw materials, mechanical methods such as crushing and mixing are used to cooperate with binders and dispersants to achieve dispersion, and do not contain coagulation particles as much as possible.

The binder is affected by the type and its molecular weight, the properties of the particle surface and the solubility of the solvent, etc., and is adsorbed on the surface of the raw material particles, and plays a role in preventing the agglomeration of the powder raw material through the three-dimensional stabilization effect.

Silicon carbide ceramic materials have excellent characteristics such as high temperature strength, high temperature oxidation resistance, good wear resistance, thermal stability, small thermal expansion coefficient, high thermal conductivity, high hardness, thermal shock resistance and chemical corrosion resistance. It has been widely used in automobiles, machinery and chemical industry, environmental protection, space technology, information electronics, energy and other fields, and has become an irreplaceable structural ceramic with excellent performance in many industrial fields.

The excellent properties of SiC ceramics are closely related to their unique structure. SiC is a compound with strong covalent bonds, and the ionic nature of Si-C bonds in SiC is only about 12%. Therefore, SiC has high strength, large elastic modulus, and excellent wear resistance.

Pure SiC is not attacked by acid solutions such as HCl, HNO3, H2SO4 and HF, as well as alkali solutions such as NaOH. Oxidation is easy to occur when heated in air, but the SiO2 formed on the surface during oxidation inhibits the further diffusion of oxygen, so the oxidation rate is not high. In terms of electrical properties, SiC is semiconductor, and the introduction of a small amount of impurities will exhibit good conductivity.

In addition, SiC has excellent thermal conductivity.

SiC has two crystal forms, and . The crystal structure of -SiC is a cubic crystal system, and Si and C form a face-centered cubic lattice, respectively. -There are more than 100 polytypes such as 4H, 15R and 6H, among which 6H polytypes are the most common in industrial applications. There is a certain thermal stability relationship between the various types of SiC.

At temperatures below 1600, the SiC exists in the form of -SiC. When above 1600, -sic slowly transforms into various polytypes of -sic. 4H-SiC is easy to generate around 2000; Both 15R and 6H polytypes need to be at a high temperature of more than 2100 to be easy to generate. For 6H-SiC, it is very stable even when the temperature exceeds 2200 °C.

The free energy difference between the various polytypes in SiC is very small, so the solid solution of trace impurities can also cause changes in the thermal stability relationship between polytypes.

Silicon carbide (SiC) ceramics have excellent characteristics such as strong oxidation resistance, good wear resistance, high hardness, good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, thermal shock resistance and chemical corrosion resistance. Therefore, it has been shown in the fields of petroleum, chemical industry, machinery, aerospace, nuclear energy, etc., and has attracted more and more attention. For example, SiC ceramics are used in various types of bearings, balls, nozzles, seals, cutting tools, gas turbine blades, turbocharger rotors, reflective screens, and rocket combustion chamber liners, to name a few.

The production process of SiC ceramics is briefly described as follows:

Synthesis of SiC powder:

SiC is almost non-existent on Earth, only found in meteorites, therefore, the SIC powder used in industry is synthetic. At present, the main methods for synthesizing SiC powders are:

1. Acheson method:

This is the most widely used synthesis method in the industry, that is, the mixture of quartz sand and coke is heated to a high temperature of about 2500 degrees by electricity to prepare it. Because quartz sand and coke usually contain impurities such as Al and Fe, a small amount of impurities are solidly dissolved in the made SiC. Among them, the one with few impurities is green, and the one with more impurities is black.

2. Legalization:

At a certain temperature, the high-purity silicon reacts directly with the carbon black. This enables the synthesis of high-purity -SiC powders.

3. Thermal decomposition method:

Silicone polymers such as polycarbonsilane or trichloromethylsilane are decomposed in the temperature range of 1200 1500 to produce submicron-sized -SiC powder.

4. Gas opposite phase method:

Make silicon-containing gases such as SiCl4 and SiH4 and carbonaceous gases such as CH4, C3H8, C7H8 and (Cl4) or make CH3SiCl3, (CH3)2

Gases containing both silicon and carbon, such as SiCl2 and Si(CH3)4, react at high temperatures to prepare nano-sized -SiC ultrafine powders.