3results about How to "Reduce melt surface tension" patented technology

The invention relates to the technical field of alloy coatings, in particular to an in-situ TiC reinforced AlCoCrFeNiMo high-entropy alloy laser cladding coating and a preparation method thereof.The preparation method comprises the steps that S1, mixed metal powder, Ti powder, graphite powder and modified powder are added into a ball milling tank and subjected to ball milling under argon protection; s2, the surface of the base material is polished with abrasive paper, an interface bonding modifier is sprayed after ultrasonic cleaning, and a pretreated base material is obtained; and S3, cladding a coating on the surface of the base material by using DML2000 laser cladding equipment, and cooling to room temperature along with the furnace after cladding is completed. According to the method, through the in-situ reaction of Ti and C in the laser cladding process, a TiC reinforced phase is generated in an AlCoCrFeNiMo high-entropy alloy matrix, the problems of uneven distribution, poor interface bonding and the like caused by direct addition of TiC are avoided, and the bonding strength of the reinforced phase and the matrix is improved. And due to introduction of TiC, crystal grains are refined, lattice distortion is increased, and therefore the comprehensive performance of the coating is improved.

The application discloses a kind of electronic paste lead-free insulating glass composition and its preparation method and application, by with SiO2-B2O3-ZnO as basis lead-free system, introduce SrO, ZrO2, BaO, CaO multiple oxides co-doped precision control material performance, limit the weight ratio of each oxide component;Support segmented temperature melting, heat insulation intermittent stirring homogenization, water quenching, two-stage classification ball milling screening integrated preparation process, the glass powder obtained is 4~7 at 1MHz under dielectric constant, thermal conductivity coefficient 0.9~1.3W / (mK), softening temperature 650~850℃, thermal expansion coefficient 5~7× / ℃, compared with conventional lead-free glass, high-frequency dielectric loss is reduced, and the heat conduction performance is improved, silicon, alumina, Kovar, titanium alloy multiple substrates can be compatible, the adhesive strength and packaging air tightness after sintering are excellent, the preparation process is mature, and the raw material cost is lower, which can be directly used as silver paste, copper paste inorganic insulating bonding phase, and is widely applied to thick film radio frequency circuit, vehicle-mounted power device, chip packaging interconnection paste.

The application provides a kind of for magneto-optical detection double-sided garnet single crystal film and its preparation method and application.The preparation method comprises the following steps: using Ga2O3, Tm2O3, Fe2O3, Bi2O3 as raw materials, then adding K2CO3, mixing, melting, to obtain a homogeneous melt;cleaning the substrate;the cleaned substrate is put into the melt, at a temperature of 850-920°C, the substrate rotation speed is 50-110rpm / min, the growth time is 5-15min, after the growth is completed, cleaning, to obtain a kind of for magneto-optical detection double-sided garnet single crystal film according to the application.The application adopts liquid phase epitaxy process, realizes the growth of high-quality thin film, prepares a kind of double-sided single crystal garnet magneto-optical thin film which can be used for magneto-optical detection, the preparation process is simple, the stability is high, and industrial production can be realized.