168results about How to "Solve the peeling problem" patented technology

The invention discloses a C / SiC coating with a pore structure and a preparation method of the same. The prepared C / SiC coating material is closely combined with the matrix, and is divided into a typical three-region structure, wherein the three regions include an interface combination region, a pore transition region and an outer layer compact region, and many pores with the diameter of 3-20 micrometers are distributed in the area between the compact outer layer and the interface layer of the coating. The preparation technology provided by the invention is used for preparing the C / SiC coating with a pore structure, of which the diameter is 3-20 micrometers, in a self-designed slot type deposition chamber, by controlling the slot size to be 2-8mm, using MTS as an SiC source gas, using H2 as MTS carrier gas and using H2 and Ar as conditioning gases. A large flow negative pressure rapid deposition technology is used, the reactant gases rapidly pass through the slot to realize deposition. For the C / SiC coating with the pore structure prepared by the invention, the bonding strength of the coating and the matrix is improved, the coating fissure caused by heat stress is remitted to a great extent, and the usability of the coating is improved greatly. Meanwhile, the problems of long cycle and limit on size in gas phase coating preparation of the normal technology are solved.

A surface-treated stainless-steel sheet with excellent corrosion resistance in a salt damage environment for automotive fuel tanks, characterized by comprising: a ferritic stainless-steel sheet base containing 10.0-25.0 mass% chromium and having an average r value of 1.4 or higher and an overall elongation of 30% or higher or an austenitic stainless-steel sheet base containing 10.0-25.0 mass% chromium and having an overall elongation of 45% or higher and a degree of work hardening of 400 N / mm<2> or lower; and a deposit layer formed over a surface of the base in an amount of 5-80 g / m<2>, the deposit layer containing 5-13 mass% silicon, with the remainder being unavoidable impurities and aluminum. It is further characterized in that the alloy layer formed between the deposit layer and the base iron has a thickness smaller than 5.0 [mu]m, and that it has, formed on the deposit layer, a lubricant coating film which comprises a soluble resin and a lubricity-imparting agent, the amount of the agent being 1-30 mass% based on the soluble resin, and has a coefficient of friction of 0.15 or lower.

The invention relates to a method for preparing membrane electrode for solid polymer water electrolyte. It evaporates solid polymer electrolyte solution and forms film, couples catalytic layer composed of catalyst and solid polymer electrolyte on two sides to form integrated membrane electrode, then crystalizes membrane electrode to realize co-crystallization for solid polymer electrolyte. The combination between membrane and catalytic layer is tight and the stratification between membrane and electrode caused by gas evolution and wahsing during water electrolysis process is solved. The invention can produce solid polymer water electrolyte with high performance, high stability and high durability.