210 results about "Partial melting" patented technology

A process to chemically refine and consolidate tantalum, niobium and their alloys to a fabricated product of net shape or near-net shape with higher throughput, more consistency, and lower manufacturing costs compared to prior art routes or rejuvenate damaged and deteriorated refractory metal parts. Powder metal is loaded into hoppers to be fed into laser forming/melting equipment. A suitable substrate is loaded into a laser forming/melting chamber onto which the powder will be deposited and consolidated in a point-scan process. As the powder is fed onto successive points of the surface of the substrate in linear traces, the laser is used to heat and partially melt the substrate and completely melt the powder. A combined deposition and melt beam traces the substrate surface repeatedly over a selected area to build up a dense coating of controlled microstructure in multiple layers. A fully dense deposit is built up that becomes the desired shape.

A process of making a paper or nonwoven article is provide. The process comprising:

• • a) providing a fiber furnish comprising a plurality of fibers and a plurality of binder microfibers, wherein the binder microfibers comprise a water non-dispersible, synthetic polymer; wherein the binder microfibers have a length of less than 25 millimeters and a fineness of less than 0.5 d/f; and wherein the binder microfibers have a melting temperature that is less than the melting temperature of the fibers;
  • b) routing the fiber furnish to a wet-laid nonwoven process to produce at least one wet-laid nonwoven web layer;
  • c) removing water from the wet-laid nonwoven web layer; and
  • d) thermally bonding the wet-laid nonwoven web layer after step (c); wherein the thermal bonding is conducted at a temperature such that the surfaces of the binder microfibers at least partially melt without causing the fibers to melt thereby bonding the binder microfibers to the fibers to produce the paper or nonwoven article.

A method for forming or remanufacturing a component to have an internal space. A refractory metal blocking element is formed, in situ, with at least a portion to be within the internal space. The formation includes an at least partial melting. A material is added, the blocking element at least partially blocking entry of the material to the internal space. The blocking element is removed.

Provided are a method of forming a polycrystalline silicon thin film with improved electrical characteristics and a method of manufacturing a thin film transistor using the method of forming the polycrystalline silicon thin film. The method includes forming an amorphous silicon thin film on a substrate, partially melting a portion of the amorphous silicon thin film by irradiating the portion of the amorphous silicon thin film with a laser beam having a low energy density, forming polycrystalline silicon grains with a predetermined crystalline arrangement by crystallizing the partially molten portion of the amorphous silicon thin film, completely melting a portion of the polycrystalline silicon grains and a portion of the amorphous silicon thin film by irradiation of a laser beam having a high energy density while repeatedly moving the substrate by a predetermined distance, and growing the polycrystalline silicon grains by crystallizing the completely molten silicon homogeneously with the predetermined crystalline arrangement.

At least one exemplary embodiment is directed toward accelerating charged hydrogenated fluid into collisions of sufficient energy to initiate at least partial fusion of the collisional hydrogenated fluid, where one of the products of the collision is a product including an element higher in the periodic tables than at least one of the colliding fluids, and where, optionally, the at least partial fusion heats a coolant loop which in turn generates electricity.

A method for producing a welded resin material contains steps of: superimposing a resin member having transmissibility to laser light and a resin member having absorptivity to laser light to form a contact part where the resin members are in contact with each other; forming a closed space that is adjacent to the contact part and faces one end of the contact part; and radiating the laser light from the resin member having transmissibility while pressing the resin members to each other through the contact part, so as to heat the contact part to melt a resin at the contact part, housing a resin excluded from the contact part through melting in the closed space, solidifying the resin melted at the contact part to weld the resin members.

The present invention provides a method of drawing a thermoelectrically active material in a glass cladding, comprising sealing off one end of a glass tube such that the tube has an open end and a closed end, introducing the thermoelectrically active material inside the glass tube and evacuating the tube by attaching the open end to a vacuum pump, heating a portion of the glass tube such that the glass partially melts and collapses under the vacuum such that the partially melted glass tube provides an ampoule containing the thermoelectric material to be used in a first drawing operation, introducing the ampoule containing the thermoelectric material into a heating device, increasing the temperature within the heating device such that the glass tube melts just enough for it to be drawn and drawing fibers of glass clad thermoelectrically active material. The invention further provides a method for bunching together such fibers and re-drawing them one or more times to produce arrays of thermoelectric nanowires clad in glass.

A reversible, heat-set covered fiber is described, the covered fiber comprising: A. A core comprising an elastic fiber comprising a substantially crosslinked, temperature-stable, olefin polymer, and B. A cover comprising an inelastic fiber. The fiber is head set by a method comprising: (a) Stretching the covered fiber by applying a stretching force to the covered fiber; (b) Heating the stretched covered fiber of (a) to a temperature in excess of the crystalline melting point of the olefin polymer for a period of time sufficient to at least partially melt the olefin polymer; (c) Cooling the stretched and heated covered fiber of (b) to a temperature below the crystalline melting point of the olefin polymer for a period of time sufficient to solidify the polymer; and (d) Removing the stretching force from the covered fiber.

A braze material and processes for making and using the material, such as for use in the manufacturing, coating, repair, and build-up of superalloy components. The braze material is composed of particles with melt-modifying constituents that are limited to the surfaces of the particles, yet are capable of sufficiently promoting the heating of the particles by conventional means and microwave radiation to achieve at least partial melting of the particles. The melt-modifying constituents are in the form of particulates embedded in the outer surface region of each particle. The particulates are formed of melting point depressant(s) and/or microwave coupling enhancer(s), are much smaller than the particle in which they are embedded.

An improved process for producing a consolidated polymeric monolith from an assembly of thermoplastic polymer. The assembly is placed under pressure to fill a majority of the voids thereof by mechanical deformation of the fibers, and heated to a temperature too low to melt the fibers at the deformation pressure but sufficiently high to at least partly melt the fibers at a lower transition pressure. While maintaining the assembly at this temperature, the pressure is reduced to the transition pressure long enough for partial melting of the fibers to fill the rest of the voids, and then is increased to a consolidation pressure at least as high as the deformation pressure. The assembly is cooled slowly to ambient temperature at the consolidation pressure. The process allows accurate control of thermal expansion coefficients of the product. Further, products of manufacture produced by the process exhibit improved strength, thermal stability, infrared transparency and unique intrinsic physical characteristics.

The principle of the deposition technique uses ultrafine crystals of ceramic oxides deposited relatively cold on melted or partially melted surfaces of ceramic tiles and other glazed ceramics, creating a spotty deposition without a significant change of optical properties of the surface. Because the desired nano-substance is deposited cold in a solid state form on the hot “sticky” surfaces and rapidly cooled down, deposited material is directly melted into the substrate surface, but its outer side remains unchanged. It allows creating a deposition with the desired parameters, for amplifying and extending the antibacterial protection in the dark, these surfaces may contain noble and heavy metals, deposited either dry as a part of the powder, or in a separate step, directly on the surface by wet depostion followed by drying and calcination.

A melting furnace is mounted adjacent a growth furnace in which a single crystal ingot is pulled from the melt according to the Czochralski method. The melting furnace comprises a receiving container for melting therein raw material in a particle or powder form falling in it from a feeder. The receiving container accommodates a set of slope-wise plates providing a distributed sliding of partially melted raw material particles over the surface of these plates and their complete melting while moving downward; eventually the melted raw material flows into the crucible of the growth furnace through a heated conveying tube extending slantingly from the conical bottom of the receiving container to the crucible through coaxial openings in housings of both furnaces. The rate of feeding is defined solely by a feeder, and at continuous feeding the raw material flows continuously by gravity from the feeder to the crucible of the growth furnace, first in a solid state (powder, granules, pellets, etc.) and then in a liquid state.

The invention discloses a powder medium diffusion reaction resistance brazing method of magnesium and a magnesium alloy material, applying in welding of the magnesium and the magnesium alloy material. In the method, a magnesium base powder medium is used as a filling layer, thus improving the problem that contact resistance of the magnesium alloy material is difficult to be welded at the initial stage of the welding; and resistance heat is used as a welding heat source, under the protection of a protective gas and the action of the resistance heat, the partial melting of the surface to be welded of the material and the rapid melting of the powder medium are synchronized to form an alloy solder. Under the impact action of an electrode voltage with a proper magnitude, an oxide film smashes, the powder medium generates an eutectic reaction on the interface of the material to be welded and an eutectic is formed on the interface by virtue of a diffusion action among dissimilar metals, thereby realizing the reliable connection of the materials. The method is mainly used for achieving the welding under the environment of inert gas protection and has strong flexibility and relative ideal project meaning.

The invention discloses a technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder. According to the technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder, the high-entropy alloy powder is mainly composed of AlFeCuCoNiTiCrx, wherein the x is molar ratio of the Al to the Cr and is between 0 to 0.3, and the size of the powder is 100-300 meshes. When high-entropy alloy powder media are used as a filling layer, the contact resistance of a stainless steel material which are different to weld at the early welding stage is improved, resistance heat is used as a welding heat source, partial melting of the surface of the material to be welded is achieved under the protection of protective air and under the action of the resistance heat, an oxidation film can be broken under the impact effect of proper electrode pressure, refining of the high-entropy alloy powder media can be achieved on the interface of the material to be welded, a molten core and a single face-centered cubic tissue are formed on the interface, and then the strength and the corrosion resistance of a connector are improved. The technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder has the advantages that welding can be achieved under the thermal compensation condition, the flexibility is strong, and ideal engineering significance is achieved.

A leaf seal for sealing a shaft rotating about an axis, in particular in a gas turbine, includes a plurality of spaced-apart leaves arranged in a concentric circle around the axis and fixed in position by brazing, the leaves having surfaces oriented essentially parallel to the axis. The leaves are brazed to one another via intermediate spacers made of a brazing foil, so that a brazed joint is produced by brazing alloy from the brazing foils. The brazing temperature may be set to an optimum value just above the solidus temperature of the brazing foil, at which partial melting of the brazing foil occurs and penetration of liquid brazing alloy into the gap between the leaves is avoided.

Methods and systems are provided for monitoring a solid-liquid interface, including providing a vessel configured to contain an at least partially melted material; detecting radiation reflected from a surface of a liquid portion of the at least partially melted material that is parallel with the liquid surface; measuring a disturbance on the surface; calculating at least one frequency associated with the disturbance; and determining a thickness of the liquid portion based on the at least one frequency, wherein the thickness is calculated based on

where g is the gravitational constant, w is the horizontal width of the liquid, and f is the at least one frequency.

The invention relates to a phase-change heat accumulation type heat flow sensor mainly consisting of a shell, an upper cover, a lower cover, a back cover, a phase-change heat accumulation body, a constantan circular foil, two nickel chrome wires, a thermoelectric couple, a four-hole aluminum oxide ceramic tube and the like, wherein the surface of the constantan circular foil is blacked, the constantan circular foil and the two nickel chrome wires form a measurement end surface sensitive body, the upper cover is welded with the shell after being welded with the measurement end surface sensitive body; after the phase-change heat accumulation body is screwed in, the lower cover is welded with the shell; and the two nickel chrome wires at the constantan circular foil and the thermoelectric couple are drawn out by the back cover in a fastening manner after passing through the four-hole aluminum oxide ceramic tube. According to the phase-change heat accumulation type heat flow sensor disclosed by the invention, by utilizing the phase-change heat accumulation principle, the working time is remarkably prolonged; by utilizing an E-shaped difference thermocouple, the high temperature resistance of the measurement end surface is largely improved; and by utilizing the thermocouple, a measurement end part is added with a temperature monitoring function and the situations that the measurement end part is molten, burn and the like are avoided.

A process for forming a coating on a surface of a substrate, so that heating of the coating material is selective and sufficient to cause at least partial melting of the coating material and permit bonding to the substrate without excessively heating the substrate so as not to significantly degrade its properties. The process generally entails forming a brazing paste containing powder particles dispersed in a binder. The particles are formed of a composition that is susceptible to microwave radiation. The brazing paste is then applied to the surface of the substrate and subjected to microwave radiation so that the particles couple with the microwave radiation and are sufficiently heated to burn off the binder and then at least partially melt to form an at least partially molten layer on the substrate. The microwave radiation is then interrupted to allow the at least partially molten layer to cool, solidify, and form the coating.

The invention provides a method for preparing high-purity resorcinol through melt crystallization. The method mainly comprises steps of melt crystallization, partial melting (sweating) and melting. According to the invention, a graded melt crystallization method is adopted, and the process is carried out in a falling film dynamic crystallization device, such that non-pure resorcinol is purified. The adopted grade number should satisfy a final purity expectation obtained with a high yield. At least one grade is adopted, and commonly several grades are adopted. The grade number varies from 1 to 4, such that a complete resorcinol product crystallization refining circulation is formed. The method is advantaged in that: no solvent is required by melt crystallization, such that the product is prevented from being polluted by exterior solvents or other materials. Especially, latent pollution to resorcinol caused by back-mixing of solution crystallization impurities and degradation reactions caused by high rectification temperature can be prevented, and the influence of waste water caused by solution crystallization to the environment can be avoided. The product yield is high, the product purity is high, and the production efficiency is high.