4results about How to "Improve interlayer bonding performance" patented technology

This invention belongs to the field of metal coating technology, specifically relating to a gradient composite coating, its preparation method, and its application. The composite coating of this invention comprises a multilayer Al3BC / Al composite material coating, wherein the Al3BC content in the Al3BC / Al composite material is 0 wt.% to 80 wt.%, and the Al3BC content increases or decreases sequentially from the inside to the outside of the multilayer coating, wherein the multilayer comprises at least three layers. The gradient Al3BC / Al composite coating of this invention balances high reflectivity, ablation resistance, lateral heat dissipation, longitudinal heat insulation, and low internal stress in laser protection scenarios, as well as high surface hardness, low interfacial stress, and high bonding strength in wear-resistant scenarios. Furthermore, the preparation method of the gradient Al3BC / Al composite coating is simple, with controllable parameters, and suitable for mass production. This invention also provides applications of this coating in the fields of laser protection coatings and wear-resistant coatings.

This utility model discloses a lead frame with extended pins, relating to the field of semiconductor packaging technology. The lead frame includes a base island, a first pin array, and a second pin array. The base island, from top to bottom, includes an electrical shielding layer, a heat diffusion layer, a dielectric isolation layer, a signal transmission layer, a stress conditioning layer, and an interface enhancement layer. The heat diffusion layer is fixed above the electromagnetic shielding layer via interface metallurgical bonding, with its edge extending upwards to form a ring-shaped support platform. The first pin array extends horizontally outwards from the outer wall of the ring-shaped support platform of the heat diffusion layer and extends to the outer side of the base island. The second pin array extends inwards from the central region of the dielectric isolation layer towards the inner side of the ring-shaped support platform. This lead frame with extended pins, through a multi-layer composite base island structure and the coordinated design of the extended pins, achieves performance optimization in electromagnetic shielding, high-frequency signal attenuation reduction, and mechanical strength enhancement.

This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.

The invention relates to a composite metal foil with high peel strength, a metal-clad laminated plate and a battery. The high-peel-strength composite metal foil comprises a base film layer and a metal layer, the metal layer is arranged on at least one side face of the base film layer, a plurality of protrusions are arranged on the side face, close to the base film layer, of the metal layer, the height of the protrusions is 0.5-5 micrometers, the protrusions comprise the first protrusions and the second protrusions, the height of the first protrusions is 1.5-5 micrometers, the height of the second protrusions is 1.5-5 micrometers, and the height of the second protrusions is 1.5-5 micrometers. The height of the second protrusions ranges from 0.5 micrometer to 1.5 micrometers. Wherein the second protrusions are arranged between at least 40% of the adjacent first protrusions. The overall design is beneficial to improving the interlayer binding force between the metal layer and the base film layer, the delamination resistance of the composite metal foil can be improved, the working safety of the lithium battery can be improved, meanwhile, the bonding stability of a circuit and the metal foil can be improved when the composite metal foil is used for circuit manufacturing, and the circuit manufacturing quality can be improved.