30results about How to "Improve interface integration" patented technology

The invention discloses a polycrystalline diamond composite sheet. In the polycrystalline diamond composite sheet provided by the invention, a polycrystalline diamond layer is not directly combined with a hard alloy layer, but a transitional layer is added between the polycrystalline diamond layer and the hard alloy layer. The transitional layer can be a single layer or formed by multiple layers, and the compositions of the transitional layer are different from one another according to different purposes. The transitional layer is added between the polycrystalline diamond layer and the hard alloy layer, so that the interface combination condition of the polycrystalline diamond composite sheet can be improved, interfacial stress can be reduced, and the abrasion resistance and the impact-resistant toughness of the polycrystalline diamond composite sheet can be synchronously improved.

The invention discloses a preparation method of an in-situ particle reinforced aluminum-based composite material. The preparation method comprises the following steps: firstly, performing pretreatment on uhligite tailings, namely screening the uhligite tailings by use of a specific gravity method before ball milling, then screening by use of a screen to obtain the uhligite tailings having the particle diameter ranging from 150 microns to 180 microns, and drying to obtain tailing addition particles; secondly, adding the tailing addition particles to pure aluminum by use of a stirring casting method to obtain the in-situ particle reinforced aluminum-based composite material. The adopted uhligite tailings are relatively high in SiO2 content, and also contain aluminum silicate having positive contribution to the mechanical properties of the composite material; seen from the microstructure of the material, the reinforcing body is well bonded with the substrate and the reinforcing body is evenly distributed; the addition amount of the reinforcing body is easy to control, and the prepared composite material shows excellent mechanical properties.

The invention discloses an in-situ fiber-forming strengthened degradable medical elastic composite material and a preparation method thereof. The composite material is prepared by premixing polyglycolic acid or poly-(L-lactic acid) and poly-(L-lactide-tao-caprolactone) by a weight ratio of 20:80 to 5:95 in an inert gas atmosphere; extruding the mixture in a plastic extruder with a screw rotation speed of 10-80 r / min; hauling the extruded mixture by a hauling machine at a hauling speed of 1-30 m / min; controlling a die diameter / a spline diameter to be 1-6; and quenching with water in a hauling process. The composite material can be fully biologically degraded, has obviously improved tensile strength, enables fused mass to have little abrasion on the inner wall of an equipment cavity in the processing process and can be used in medical fields, such as degradable catheters, elastic fascia, artificial skin, and the like.

The invention belongs to the technical field of lightning protection of aircraft composite materials, and in particular relates to a carbon nanotube film / composite material forming method and a lightning protection structure made therefrom. The molding method adopts a low-cost liquid molding one-step method to obtain an ultra-light carbon nanotube film / composite material lightning protection structure as a whole. The lightning protection structure includes: a carbon nanotube film used as a conductive layer; a composite material including fibers and resin filled in the fibers; an adhesive film used for electrical insulation between the composite material and the carbon nanotube film ; The carbon nanotube film, adhesive film and composite material are arranged in sequence. The lightning protection structure can be integrally formed in one step.

The invention discloses a surface-modified and fiber-reinforced polyurethane composite material and a preparation method thereof. The composite material comprises the following components in parts byweight: 100 parts of compound polyether polyol, 0.3-1.5 parts of silicone oil, 0.8-1.4 parts of a catalyst, 1-3 parts of a coupling agent, 6.7-12.5 parts of a compound foaming agent, 4-9 parts of a fire retardant, 27-36 parts of isocyanate, and 12-20 parts of surface modifying palm fibers. According to the surface-modified and fiber-reinforced polyurethane composite material, the surface modifyingpalm fibers are used for preparing the fiber-reinforced polyurethane composite material; the palm fibers are high in elasticity, high in toughness, and high in breaking tenacity, so that the strengthof the polyurethane composite material is improved; the palm fibers are subjected to surface modification, so that the boundary combination condition of the fibers and a material substrate can be improved. The surface-modified and fiber-reinforced polyurethane composite material are relatively high in mechanical strength and high in fireproof and flame retarding performances.

The invention discloses a low-VOC natural fiber composite material, a preparation method and an application thereof. In the method, a VOC capture agent is sprayed into a mixed fiber of natural fiber and polypropylene after opening; the sprayed natural fiber The mixed fiber of fiber and polypropylene is processed into a fiber mat through a carding and needle-punching process; and the fiber mat is subjected to a heat-pressing process to prepare the low-VOC natural fiber composite material. The invention reduces the release amount of VOC of the natural fiber composite material by adding a VOC capture agent in the preparation process of the natural fiber composite material, and at the same time greatly improves the mechanical properties of the natural fiber composite material.

The invention relates to a thermoplastic polymer composite material with high nail-holding force, which is prepared from raw materials including base resin and polyester-maleic anhydride graft; the polyester-maleic anhydride graft is made of polyester It is co-extruded with maleic anhydride, wherein the mass percentage of polyester is 95-99%; the base resin is the same or different from the polyester forming the graft. The invention also provides the preparation method and application of the composite material. The composite material provided by the invention has the characteristics of good compatibility with PVC, high mechanical strength, high weld angle strength, high nail holding force, high and low temperature resistance, low water absorption, energy saving and environmental protection, and recyclable utilization, and can be applied to self-reinforcement Door and window profiles, panels, etc.

The invention provides a HIPS composite material and a preparation method and application thereof, comprising the following components by mass percentage: HIPS resin: HIPS resin: 35-75 parts; PA resin: 15-40 parts; antistatic agent: 8-20 parts part; copper acetate: 0.1-0.5 part; toughening agent: 4-10 part; processing aid: 0.5-1.5 part. The HIPS composite material of the invention has the characteristics of high strength, high heat resistance, antistatic and excellent barrier properties.

The invention discloses a preparation method of a fine-grain / ultra-fine-grain metal stratified material. The preparation method comprises the following steps of: (1) selecting n metal material samples, and preprocessing laminated faces of the metal material samples, wherein n is more than or equal to 2; and (2) laminating the metal material samples to form a combined sample, putting the combined sample into a non-equal channel angular extrusion-rolling mold, carrying out composite extrusion-rolling: applying an extrusion force to enable the combined sample to pass through a corner of the mold so that the combined sample generates shear deformation and compression deformation at the same time so as to form the fine-grain / ultra-fine-grain metal stratified material, wherein the composite extrusion-rolling is single-pass composite extrusion-rolling or multi-pass composite extrusion-rolling. By utilizing the method disclosed by the invention, the fine-grain or ultra-fine-grain metal stratified material can be prepared, and the high interface bonding strength can be achieved. The method has the characteristics of simple process, high efficiency, low device requirement and the like; and meanwhile, the material prepared by utilizing the method has good mechanical properties.

The invention belongs to the field of powder titanium alloy materials, and relates to a nano material and titanium alloy composite powder preparing method, in particular to a graphene and titanium alloy composite powder ball milling preparing method. Firstly, an oxidized graphene nano sheet is added in absolute ethyl alcohol, a high-speed mechanical stirrer and an ultrasonic cell pulverizer are adopted for scattering treatment, and an oxidized graphene solution is prepared; then titanium alloy powder and the oxidized graphene solution are arranged in all-direction planet ball milling equipmentto be subjected to controlled-temperature ball milling mixing; then, obtained oxidized graphene and titanium alloy powder muddy liquid is subjected to low-speed continuous stirring till oxidized graphene and titanium alloy composite powder slurry is formed; and after drying treatment, the graphene and titanium alloy composite powder is obtained. By means of the method, good interface bonding is formed between graphene and titanium alloy powder, and dispersibility of the graphene in the titanium alloy powder is greatly improved.

The invention discloses a method for preparing ceramic particle-reinforced metal-matrix composite materials by microwave-ultrasonic coupling. Ceramic particles, metal powder chips and organic binders are mixed and then microwave-melted, and the melted mixture is subjected to continuous microwave action. Put it in an ultrasonic field for ultrasonic treatment, and then inject the treated melt into the cavity for cooling and molding, which solves the problems of inconsistent heating, poor interface bonding ability, high energy consumption, and poor molding of ceramic particle reinforced metal matrix composites in the traditional process. Problems such as long period and uneven particle distribution, under high-power microwave radiation, ceramic particles and metal powder chips in ceramic particle reinforced metal matrix composites absorb microwaves at the same time, not only can use microwave thermal effect to achieve rapid and uniform volume heating of materials, The non-thermal effect of microwave can also be used to improve the interface bonding strength between particles and matrix to a certain extent. At the same time, ultrasonic can realize the uniform distribution of particles in the melt.