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Metal-to-Ceramic Joining Methods to Support Development of Advanced Ceramic-Based CSP Components
The National Renewable Energy Laboratory, Missouri University of Science and Technology (MS&T), Massachusetts Institute of Technology (MIT), and Colorado School of Mines (CSM) collaborated to design, develop, and test a material concept at bench scale which will be used to achieve a ceramic-to-metal (C2M) joint between a selected metal HTF loop material and a selected ceramic material used by the Gen3 CSP technology pathway. The final joint assembly will need to possess sufficient mechanical properties to withstand static high-temperature (650 degrees-700 degrees C) and high-pressure (20 MPa) and thermal cycling (between 650 degrees C and 100 degrees C) conditions. The material concept consists of three key components: (1) a ceramic matrix composite (CMC) that serves as a compliant transition material aiming to mitigate the stresses due to the mismatch of coefficient of thermal expansion (CTE) from a direct ceramic-to-metal joint, (2) a metal-end joint utilizing a multi-principal element alloy (MPEA) with changing percentage of particle loading to bond the candidate metal to the CMC, and (3) a ceramic-end joint utilizing a glass ceramic to bond the candidate ceramic to the CMC.
Joining Study for Formed Plate Heat Exchangers (CRADA Final Report)
Plate heat exchangers (PHEs) have been used in numerous industrial applications, such as HVAC systems, power generation, transportation and manufacturing. The performance of plate heat exchangers is frequently undermined by corrosion, fouling, and scaling. These phenomena not only diminish heat transfer efficiency but also lead to increased operational costs, maintenance demands, and reduced equipment lifespan. In this project, the team addressed the widespread challenges of corrosion, fouling, and scaling, and explored alternative material solutions. While commonly used materials like stainless steel and titanium offer notable benefits, they can still experience corrosion under certain operating conditions. The advancement of new materials and surface engineering technologies, such as advanced coating, ceramics, composites materials, and high entropy alloys are promising for can help solve these issues, enable longer lifetime and high performance of plate heat exchangers.
Joining Study for Formed Plate Heat Exchangers (Final Report)
Plate heat exchangers (PHEs) have been used in numerous industrial applications, such as HVAC systems, power generation, transportation and manufacturing. The performance of plate heat exchangers is frequently undermined by corrosion, fouling, and scaling. These phenomena not only diminish heat transfer efficiency but also lead to increased operational costs, maintenance demands, and reduced equipment lifespan. In this project, the team addressed the widespread challenges of corrosion, fouling, and scaling, and explored alternative material solutions. While commonly used materials like stainless steel and titanium offer notable benefits, they can still experience corrosion under certain operating conditions. The advancement of new materials and surface engineering technologies, such as advanced coating, ceramics, composites materials, and high entropy alloys are promising for can help solve these issues, enable longer lifetime and high performance of plate heat exchangers.
Dissimilar joining via laser welding of Ti-6Al-4V and Inconel 625 through a vanadium interlayer
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Dissimilar metal joining of Ti-6Al-4V and 304L stainless steel utilizing cold sprayed interlayers
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FAA, NASA JOIN IN SUPERSONIC TRANSPORT SIMULATOR PROGRAM
Faa and nasa joint supersonic transport simulator program
Tungsten wire and tubing joined by nickel brazing
Thin tungsten wire and tungsten tubing are brazed together using a contacting coil of nickel wire heated to its melting point in an inert-gas atmosphere. This method is also effective for brazing tungsten to tungsten-rhenium parts.
Investigate methods of fabricating and joining large sandwich segments for forming common domes monthly report, 1-31 oct. 1964
Fabrication techniques of bulkheads for Saturn upper stages
Union would facilitate joining of tubing, minimize braze contamination
Union assembly provides a fluidtight joint between two lengths of tubing and minimizes introduction of braze contaminants into the tubing. The union contains two brazing preforms separated by a metal ring that serves as a dam for the molten brazing alloy.
Lock-disconnect mechanism gives positive release to joined bodies
Umbilical system mechanism locks and unlocks through an internal collet device that is controlled by a single reciprocating shaft. The reduction in the number of operational parts results in higher reliability.
An experimental and analytical study of vibrations of joined shells.
Vibrational characteristics of composite shells, noting effects of circular joint connecting two components
Experimental and analytical study of vibrations of joined shells.
Vibrational characteristics of composite shells, noting effects of circular joint connecting two components
Investigation methods of fabricating and joining large sandwich segments for forming common domes phase 4 monthly report, 1-31 oct. 1965
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Diffusion bond method of joining steel and a TFE-bronze composite
Diffusion bonding method does not affect the mechanical properties of steel nor the strength of Teflon. It alleviates problems of adhesive outgassing, radiation damage, and delamination.
Necessary conditions for joining optimal singular and nonsingular subarcs
Necessary conditions for optimality of junctions between singular and nonsingular subarcs for singular optimal control problems
Wave propagation in stepped and joined shells Annual report, 1 Sep. 1968 - 1 Sep. 1969
Shell impact response and wave propagation in cylindrical and conical shells by experimental and analytical methods
Bonding and joining technology - A compilation
Compilation of technical information including metallurgy, electrical repair, fabrication techniques for coating, bonding and brazing, and electron beam welding