48results about How to "Strong membrane binding" patented technology

The invention discloses a preparation method of a MoS2 composite thin film with high hardness and loss abrasion on a surface of a substrate. The method comprises the following step: sequentially depositing a metal Ti priming coat, a TiN transitional layer and a Ti / MoS2 composite thin film on the surface of the substrate by using a high power pulse magnetron sputtering technology combined with optimized process conditions to obtain the MoS2 composite thin film which is strong in film binding force and high hardness and has low frictional coefficient and wear rate in various frictional environments. The nano hardness of the composite thin film is over 11GPa, the critical load value is over 60N, and the frictional coefficients in room-temperature air with relative humidity of 30%, 50% and 70%, an N2 atmosphere and a hydraulic oil environment are below 0.055. Therefore, the substrate is effectively protected in frictional reduction, and the composite thin film has a good application prospect.

The invention relates to a high-performance silicon carbide nano-fiber membrane and a preparation method thereof. The preparation method comprises the following steps: adding a certain amount of silicon carbide nano-fibers into de-ionized water; stirring and carrying out ultrasonic mixing to prepare a uniform and stable membrane preparation solution; uniformly spraying the membrane preparation solution on a porous ceramic matrix by adopting a spray coating method; after drying at constant temperature, immersing the porous ceramic matrix into metal oxide sol; then carrying out negative-pressuresuction to enable a pore channel of the matrix to be fully filled with a sol solution; drying the porous ceramic matrix adsorbed with the sol again at constant temperature; finally, raising the temperature through a program and sintering to obtain the silicon carbide nano-fiber membrane. The silicon carbide nano-fiber membrane prepared by the preparation method can be effectively embedded into the surface-layer pore channel of the matrix; the binding force between the nano-fiber membrane and the porous ceramic matrix is strong. The separation membrane provided by the invention has the advantages of good thermal shock resistance, great gas flux and the like, can be used for purification treatment of industrial tail gas and has a wide application prospect in clean production of fields including cement, glass, metallurgy, energy sources and the like.

The invention relates to a method for preparing a surface-enhanced Raman substrate by improving film-substrate bonding force. The method comprises the following steps of firstly, growing a flat transition layer on a substrate; growing a silver nanorod array thin film on the transition layer; uniformly covering the surface of silver with an ultrathin oxide film; heating the composite nanometer structure, so as to obtain the surface-enhanced Raman substrate with excellent film-substrate bonding force. The method has the advantages that the mismatching factor between the noble metal thin film andthe substrate is relieved by the transition layer, and the stress distribution and atom bonding in the whole film-substrate range are regulated; the good SERS (surface enhanced Raman scattering) sensitivity and thermal stability of the substrate are ensured by the ultrathin oxide layer at the surface of the silver nanorod; the substrate can be further heated, the atom diffusion between the thin film and the substrate can be promoted, the porosity at the interface is reduced, and the adhesion force is increased. The surface-enhanced Raman substrate with excellent film-substrate bonding force has the advantages that the easiness in falling is avoided, the stability is good, the transportation, storage and use are convenient, and the practicality of surface-enhanced Raman technique is enhanced.

The invention provides a preparation method of a diamond-like carbon film on the surface of magnesium alloy. The preparation method is characterized by comprising the following steps that (1) the surface of a magnesium alloy base material is cleaned and is subjected to sand-blasting roughening treatment, so that the treated base material is obtained; (2) a metal or metal ceramic coating is sprayed on the surface of the base material through cold spraying, and thus a cold-spayed intermediate layer is obtained on the surface of the magnesium alloy base material; (3) the cold-sprayed intermediate layer is polished, so that the set roughness is obtained; and (4) the polished magnesium alloy base material provided with the cold-sprayed intermediate layer is placed in magnetron sputtering deposition equipment, and a diamond-like carbon film is prepared on the surface of the cold-sprayed intermediate layer after coating technological parameters are set. Compared with the prior art, the cold-sprayed metal or metal ceramic coating is used as the intermediate layer, so that the heat effect on the magnesium alloy base material is small, oxidization and deformation of the base material are avoided, and the coating is compact in bonding and has high bonding strength; and the preparation method is simple in process and environmentally friendly, and the structure of the coating can be controlled.

The invention discloses a tool and mold surface complex nitride coating preparation process and belongs to the technical field of micro-nanometer coatings. According to the process, a binary evaporation source technology combing vacuum ion evaporation plating with magnetron sputtering ion plating is adopted during coating plating; at a mixed atmosphere of N2 and Ar, the Ti element is evaporated through an electron beam evaporation source, a traditional TiN film is formed, while the TiN film is formed through deposition, the Me element is implanted through a magnetron sputtering source, and a N (Ti and Me) layer is plated on the tool and mold surfaces; and Me is at least one of Ti, Al, Cr and Si. Through the process, the combination property of a tool and a mold can be improved.