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

The invention discloses an ablation-resistant fiber toughened Si-B-C-N-Zr ceramic matrix composite as well as a preparation method and an application thereof. The preparation method of the ablation-resistant fiber toughened Si-B-C-N-Zr ceramic matrix composite comprises the following steps: S1, preparing Si-B-C-N-Zr powder; S2, performing surface modification treatment on fiber to obtain modifiedfiber; S3, mixing the modified fiber with the Si-B-C-N-Zr powder to obtain composite powder; S4, performing hot pressing and sintering on the composite powder to prepare the ablation-resistant fiber toughened Si-B-C-N-Zr ceramic matrix composite. The prepared ablative-resistant fiber toughened Si-B-C-N-Zr ceramic matrix composite has good microstructure and higher fracture toughness, mechanical property and ablative resistance, used raw materials are widely sourced and low in price, the preparation process is simple and mature, the preparation period is short, all the steps can be realized with existing technologies and equipment, and the composite is suitable for industrial production.

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 present invention relates to the technical field of polymer materials, in particular to a high-physical fiberglass-reinforced polycarbonate resin composition for laser direct molding and its products. The composition is expressed in parts by weight: polycarbonate 100 60-150 parts of glass fiber with flat section shape; 5-30 parts of flame retardant; 1-25 parts of LDS additive; 1-10 parts of improving additive. The product is a product produced after laser direct molding of a high physical property glass fiber reinforced polycarbonate resin composition. The high physical property glass fiber reinforced polycarbonate resin composition and its products of the present invention enable the composition to maintain excellent mechanical strength while ensuring LDS activity, so that it can be applied to the structural parts of thin-walled products and expand the application range.

The invention provides an anti-stick waterproof board with excellent water resistance. The anti-stick waterproof board consists of a base material layer, a self-adhesive layer and an isolating membrane layer which are sequentially compounded into a whole, wherein the self-adhesive layer is positioned between the base material layer and the isolating membrane layer; the isolating membrane layer does not need to be removed, and disappears after reacting with poured concrete; the self-adhesive layer has the thickness of 0.2-0.4mm, and is prepared from the following components in parts by weight: 2-10 parts of chlorobutyl rubber, 20-30 parts of high-molecular-weight butyl rubber with a viscosity average molecular weight of 400-500 thousands, 30-50 parts of medium-molecular-weight polyisobutylene with a viscosity average molecular weight of 50-100 thousands, 20-40 parts of low-molecular-weight polyisobutylene with a viscosity average molecular weight of 1000-3000, 0.5-10 parts of vinyl-terminated silicone rubber and 1-5 parts of an antioxidant; the vinyl-terminated silicone rubber is terminal vinyl silicone rubber and has a viscosity average molecular weight of 50-300 thousands, and the mole percent of vinyl is more than 1%. The invention also provides a preparation method of the anti-stick waterproof board.

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 a preparation method of a ceramic powder doped modified self-sintering graphite composite material, belongs to the technical field of preparation of special graphite composite materials, and solves the problems that ceramic particles are difficult to disperse in raw material pressed powder, the efficiency is low, and the interface bonding strength of a matrix phase and a ceramic phase is poor. According to the method, the ceramic powder is introduced into the raw material for preparing the graphite through an in-situ coating method, so that the phenomenon of non-uniform distribution of ceramic particles is effectively improved, and effective carbon coating can be formed on the ceramic particles, so that the microcosmic interface of the material is improved. In the material preparation process, firstly, the ceramic powder is added into the modified asphalt to serve as a nucleating agent to promote liquid-phase semi-carbonization of the modified asphalt, and green coke coated composite ceramic powder is prepared; the surface green coke has the self-sintering property, so that the ceramic component and the carbon component of the material can be synchronously shrunk and densified in the subsequent heat treatment process, and finally the ceramic doped modified self-sintered graphite composite material with uniform ceramic particle distribution, high interface bonding strength and excellent comprehensive performance is prepared.

The invention discloses a composite 3D printing material and a preparation method thereof and relates to the technical field of 3D printing materials. The composite 3D printing material comprises thefollowing raw materials in part by weight: 30-50 parts of photosensitive resin, 15-30 parts of modified aramid pulp, 12-20 parts of talcum powder, 8-15 parts of pigment, 5-10 parts of polycaprolactone, 2-5 parts of aliphatic diester, 6-12 parts of ethyl acetate, 2-5 parts of a lubricating agent and 1-4 parts of a coupling agent. The composite 3D printing material prepared by the preparation methoddisclosed by the invention is easy for 3D printing, and a printed product has higher toughness, adhesiveness and impact strength.

The invention discloses an in-situ manufacturing method of a continuous fiber reinforced soft and hard mixed thermoplastic-based component. The in-situ manufacturing method comprises the following steps of (1) inputting a model needing additive manufacturing and process parameters; (2) slicing the input model to obtain an initial slicing path with n layers; (3) calculating to obtain a central point Pc of a first layer of the slicing path, and offsetting the slicing path Path to a coordinate system taking the Pc as an original point; (4) interpolating the path of each layer to a specified precision, wherein the interpolated path is PathI; (5) calculating the angle theta required by the PathI to reach the specified attitude alpha of a nozzle, and readjusting the seam between the starting point and the end point of each layer of path of the PathI to obtain Pathend; and (6) converting the Pathend into polar coordinates to be expressed, printing paths Px, y, z and generating theta of a four-axis printer, and generating control codes of the four-axis printer according to the printing speed S and the nozzle control temperature T. According to the in-situ manufacturing method, the problems of poor mechanical property and poor interface fusion of the soft and hard mixed material are solved.