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Showing 1 to 17 of 17 for “"liquid phase sintering"”.
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In-situ measurements of the Liquid-Phase Sintering of Zinc Oxide
… is the basic system for ceramic varistors. Phase formation during sintering of ZBS was measured in situ, using 1 mm thick samples and synchrotron X-rays. Thermodynamic calculations were performed to explain phase formation, composition, stability of additive oxides and influence of the …
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MESOSCALE MICROSTRUCTURE EVOLUTION, RELIABILITY AND FAILURE ANALYSIS OF HIGH TEMPERATURE TRANSIENT LIQUID PHASE SINTERING JOINTS
… temperature joining techniques, such as solid phase sintering and Transient Liquid Phase Sintering (TLPS), for producing high temperature stable attachments. TLPS is an emerging electronic interconnect technology enabling the formation of high temperature robust joints between metallic surfaces …
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Liquid Phase Sintering of Heterophasic Dielectrics in the System Barium-Titanate - Lead(5)germanium(3)oxygen(11)
Made available in DSpace on 2014-12-14T15:24:01Z (GMT). No. of bitstreams: 1 7804109.pdf: 4785631 bytes, checksum: bb3164dc9f74d567c8520d7af5b5500d (MD5) Previous issue date: 1977
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Design and processing of low alloy high carbon steels by powder metallurgy. P/M processing and liquid phase sintering of newly designed low-alloy high carbon steels based on Fe-0.85Mo-C-Si-Mn with high toughness and strength.
… ThermoCalc modelling was employed to predict liquid phase amounts for two different powder grades, Astaloy 85Mo or Astaloy CrL with additive elements such as (0.4-0.6wt%)Si, (1.2-1.4wt%)C and (1-1.5wt%)Mn, in the sintering temperature range 1285-1300ºC and such powder mixes were pressed and …
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Flash Sintering of Alumina-based Ceramics
Flash sintering is an electrical field-assisted consolidation technology and represents a very novel technique for producing ceramic materials, which allows to decrease sensibly both processing temperature and time. Starting from 2010, when flash sintering was discovered, different ceramic …
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Microstructure and phase development in yttrium barium(2) copper(3) oxygen(7) superconducting films prepared from carboxylate precursors
… prepared from carboxylate precursors by reactive liquid phase sintering. Processing effects on phase development, microstructure evolution, and important film properties, such as transition temperature, critical current density, and weak-link behavior, were investigated. The precursor …
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Breakdown in high voltage, high energy density multilayer ceramic capacitors
… located in different regions of the capacitors. Liquid-phase sintering can be used to eliminate porosity and therefore was chosen to improve the electrical and mechanical strengths of the capacitors"--Abstract, page iv.
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Processing Effects on (110K) Phase Development and Properties in Bismuth-Strontium-Calcium-Copper-Oxygen Superconducting System
… $\rm Bi\sb2Sr\sb2Ca\sb2Cu\sb3O\sb{x}$ (2223) phase was prepared by distributed liquid phase sintering of combined oxide precursors, $\rm Bi\sb2O\sb3.2SrO$ and (2CaO + 3CuO) from a starting composition of (2.8 224). The samples were characterized using four point probe resistance measurement, …
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Understanding surface and sub-surface phenomena in nickel-based superalloy castings
… core displayed a degree of pressure assisted liquid phase sintering at those locations where the nickel-based superalloy exerted a crushing force on the surface due to differential contraction after solidification. The areas affected matched that which later displayed surface melting. This was …
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Understanding and Optimizing Nanophase Separation Sintering
Sintering provides a way of producing bulk products from materials below their melting temperatures. This creates an avenue to utilize material systems that are difficult to produce from other traditional manufacturing processes. While originally used to process ceramic components, it has become a …
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Design of bulk nanocrystalline tungsten alloys via nano-phase separation sintering
An accelerated sintering method called 'nano-phase separation sintering' is developed, with specific applicability to nanostructured tungsten alloys. Nanocrystalline tungsten alloys containing minority additions of chromium are produced by high-energy ball milling and then consolidated. Such alloys …
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Applications of powder interlayers for large gap joining
… interlayers to produce large clearance transient liquid phase (TLP) joints have been developed and investigated in this work. One of the methods was using a mixture of powders of the melting point depressant (MPD) and the base material, from which a great amount of MPD (>30 vol.%) usually has to …
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Direct selective laser sintering of aluminium alloy powders
… and pre-alloyed aluminium powders, and binary liquid phase sintering (SLS) which occurred in blended bimodal or trimodal powders. That successful disruption of the oxide film is possible is a significant result, as is the constitutional effect on this. The spheroidisation and oxide disruption …
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Influence of low nitrogen gas pressures (< 1.0 MPa) and additives on the nitridation, formation and densification of B and O-SiAlON ceramics produced by reaction bonding and silicothermal reduction
… a cost efficient alternative to the traditional liquid phase sintering typically employed to produce SiAlONs. The influence of the initial compositions and of different additives on the nitridation behaviour and SiAlON phase formation have been studied. All of the additives did not have the same …
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Processability of Nickel-Boron Nanolayer Coated Boron Carbide
… of B4C, especially the compaction and sintering improvement of B4C by applying a Ni-B nanolayer coating on individual B4C particles. A modified electroless coating procedure was proposed and employed to coat nanometer Ni-B layer onto micron-sized B4C particles. The thickness was able to …
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Synthesis-Structure-Property Relationships in Lead-Free Piezoelectric Materials
… having a morphotropic (M) or polymorphic (P) phase boundary (PB), (iii) stabilization of metastable phases or finding the high temperature triclinic systems, and (iii) improving the properties of known compositions through microstructure optimization, domain engineering and multilayering. All …