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Preparation process of carbon fiber composite materials
by admin on 24-12-31
Overview of Carbon-Carbon Composite Materials Carbon/carbon (C/C) composite material is a carbon fiber reinforced composite material with a series of excellent properties such as high strength and modulus, light specific gravity, small thermal expansion coefficient, corrosion resistance, thermal ...
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Application fields of carbon/carbon composite materials
by admin on 24-12-31
Since its invention in the 1960s, the carbon-carbon C/C composites have received great attention from the military, aerospace, and nuclear energy industries. In the early stage, the manufacturing process of carbon-carbon composite was complex, technically difficult, and the preparation process wa...
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How to clean PECVD graphite boat？| VET Energy
by admin on 24-12-23
1. Acknowledgement before cleaning 1) When the PECVD graphite boat/carrier is used more than 100 to 150 times, the operator needs to check the coating condition in time. If there is an abnormal coating, it needs to be cleaned and confirmed. The normal coating color of th...
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Principle of PECVD graphite boat for solar cell (coating) | VET Energy
by admin on 24-12-23
First of all, we need to know PECVD (Plasma Enhanced Chemical Vapor Deposition). Plasma is the intensification of the thermal motion of material molecules. The collision between them will cause the gas molecules to be ionized, and the material will become a mixture of fr...
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How do new energy vehicles achieve vacuum assisted braking? | VET Energy
by admin on 24-12-18
New energy vehicles are not equipped with fuel engines, so how do they achieve vacuum-assisted braking during braking? New energy vehicles mainly achieve brake assist through two methods: The first method is to use an electric vacuum booster braking system. This system uses an electric vac...
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Why do we use UV tape for wafer dicing? | VET Energy
by admin on 24-12-16
After the wafer has gone through the previous process, the chip preparation is completed, and it needs to be cut to separate the chips on the wafer, and finally packaged. The wafer cutting process selected for wafers of different thicknesses is also different: ▪ Wafers with a thickness of more ...
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Wafer warpage, what to do?
by admin on 24-12-16
In a certain packaging process, packaging materials with different thermal expansion coefficients are used. During the packaging process, the wafer is placed on the packaging substrate, and then heating and cooling steps are performed to complete the packaging. However, due to the mismatch betwee...
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Why the reaction rate of Si and NaOH is faster than SiO2?
by admin on 24-12-10
Why the reaction rate of silicon and sodium hydroxide can surpass that of silicon dioxide can be analyzed from the following aspects: Difference in chemical bond energy ▪ Reaction of silicon and sodium hydroxide: When silicon reacts with sodium hydroxide, the Si-Si bond energy between silicon ato...
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Why is silicon so hard but so brittle?
by admin on 24-12-10
Silicon is an atomic crystal, whose atoms are connected to each other by covalent bonds, forming a spatial network structure. In this structure, the covalent bonds between atoms are very directional and have high bond energy, which makes silicon show high hardness when resisting external forces t...
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