6results about How to "Excellent surface hardness" patented technology

This invention discloses a SiC with an ultra-high temperature ceramic gradient coating. f / SiC composite materials, their preparation methods, and applications. A double-layer glow discharge plasma surface metallurgical method is used to prepare SiC composite materials. f A (Hf,Si,Ta)C gradient composite coating was prepared on the surface of the SiC composite material. This coating was able to resist SiC in an oxygen atmosphere at 1773 K. f Effective protection of SiC composite materials. The specific advantages of this invention are: (1) Ion bombardment of the substrate significantly improves the point defects and conductivity of the composite substrate; (2) The (Hf,Si,Ta)C coating has a continuous gradient structure, forming a good metallurgical bond between the coating and the substrate, with high bonding strength; (3) The similar thermal expansion coefficients of the (Hf,Si,Ta)C coating and the substrate can improve the thermal mismatch between the coating and the substrate, reducing the tendency for coating peeling and cracking during service; (4) The (Hf,Si,Ta)C coating system has a high service temperature and self-healing ability. The coating prepared by this invention has excellent high-temperature protection performance, improving the protection of SiC. f The high-temperature service life of SiC composite materials has broad application prospects in the aerospace field.

The application discloses an artificial blood vessel joint and a preparation method thereof. The blood vessel joint adopts a carbon-based material as a base body, a double-layer composite coating with PyC and Ag-doped DLC and an Ag-doped DLC coating are prepared on the inner wall and the outer wall respectively, and the blood vessel joint is obtained; the inner wall of the blood vessel joint is smooth and compact, which is beneficial to blood circulation; the outer wall is a porous Ag-doped DLC coating, which is beneficial to biological fixation with tissues; the Ag-doped DLC coating endows the blood vessel joint with good antibacterial property, reduces inflammation, and can improve the adverse reaction of the human body caused by friction and powder loss after the blood vessel joint is implanted into the human body.

Examples of the present invention provide multilayer sheets, multilayer electronic devices, etc. The multilayer sheet includes: a transparent film having a total light transmittance of 85% or more according to ISO 13468; a coating disposed on one side of the transparent film; and an adhesive layer disposed on the other side of the transparent film; the thickness of the adhesive layer after curing is less than twice the thickness of the coating. The multilayer sheets and multilayer electronic devices of the present invention do not peel off from the substrate even during repeated folding or rolling, and due to their excellent surface hardness, they exhibit excellent scratch resistance, dent resistance, etc. The multilayer sheets can be used as cover sheets for displays and offer excellent utilization for multilayer electronic devices.

A polycarbonate composite composition is provided that exhibits improved surface hardness while maintaining impact strength. The polycarbonate composite composition comprising polycarbonate and specific ester repeating units according to the invention is characterized by excellent surface hardness while retaining the inherent basic physical properties of polycarbonate.

The utility model discloses a decorative membrane and a decorative part, the decorative membrane comprises a base material layer, a texture layer and an ink layer, the texture layer and the ink layer are sequentially laminated on the base material layer, the decorative membrane further comprises a high extension layer arranged between the base material layer and the texture layer, and the elongation at break of the high extension layer is 130-150%. The decorative membrane has excellent tensile property, is easy to process, mold and inject, and can be suitable for decoration of complex shapes; the prepared plastic has excellent simulation degree, is suitable for decorative parts with wood grain-like and metal effects, has a good decorative effect, and can cover flow mark defects on the plastic surface in the injection molding process.

This invention discloses an additive repair method for a clutch drive shaft platform based on laser cladding technology, comprising: preheating the clutch drive shaft and Fe-5 iron-based powder before welding; using Fe-5 iron-based powder to perform laser melting additive manufacturing on the worn area of ​​the clutch drive shaft with no machining allowance; and subjecting the laser-melted additively manufactured clutch drive shaft to slow cooling after welding and supplementary machining, thus completing the clutch drive shaft repair. This invention transforms subtractive repair into additive repair, selecting Fe-5 iron-based powder as the additive repair powder, so that after laser cladding, its surface hardness reaches or exceeds that of the original carburized substrate surface, allowing direct cladding on the original clutch drive shaft platform, restoring the clutch drive shaft, which cannot be repaired by grinding, to its original process level. Simultaneously, the wear resistance of the repaired platform is verified through fretting wear testing.