Flame‐assisted Flash Sintering A Noncontact Method To
Guillermo R Villalobos Inventions Patents and Patent
Abstract Disclosed is a method of flash sintering a sample composed of ceramic particles by providing laser energy to change the electrical properties of the ceramic material The processes and systems disclosed herein do not require large heating equipment like a furnace allowing for a portable system of repairing ceramic materials in the field
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Field Assisted SinteringScience and Applications
The book describes resistance sintering high voltage consolidation sintering by low voltage electric pulses including spark plasma sintering flash sintering microwave sintering induction heating sintering magnetic pulse compaction and other field assisted sintering techniques
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Flash sintering of ceramicsScienceDirect
Flash sintering belongs to the wider class of Field Assisted Sintering Techniques FAST and more specifically to the Electric Current Assisted Sintering ECAS processes In FS practice an electric field is directly applied to the green specimen and the current is forced to flow within the ceramic body
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Coatings Free Full Text Preparation of Yttria
Johnson S L Venugopal G Hunt A T Flame assisted flash sintering A noncontact method to flash sinter coatings on conductive substrates J Am Ceram Soc 2018 101 536–541 Google Scholar Li G Xie H Yang G Liu G Li C Li C
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Flame assisted flash sinteringnGimat Co
The substrate is electrically conductive and is used as one electrode while the flame is used as the other electrode that is moved over the areas of the powder coating to be sintered An electrical current is used to cause a plasma produced through the flame resulting in a combined energy and temperature profile sufficient for inorganic powder powder and powder substrate bonding This method is referred to as flame assisted flash sintering
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Flame Assisted Flash Sintering for Ceramic Coated Heat
Flame Assisted Flash Sintering for Ceramic Coated Heat Exchangers The FAFS method was developed and proved feasible through a Phase I SBIR grant and we will expand our understanding of the technique through thorough R D in Phase II Sintered samples will undergo thorough surface and mechanical analysis to validate the FAFS process Sintering
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From Synthesis to Applications Copper Calcium Titanate
The bonding leads to improve strength and lower system energy Most industrial sintering is pressure less and performed without any external applied pressure Pressure assisted sintering techniques include many processes hot isotactic pressing hot pressing flash sintering and Spark Plasma sintering
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Guillermo R Villalobos Inventions Patents and Patent
Abstract Disclosed is a method of flash sintering a sample composed of ceramic particles by providing laser energy to change the electrical properties of the ceramic material The processes and systems disclosed herein do not require large heating equipment like a furnace allowing for a portable system of repairing ceramic materials in the field
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Journal PublicationsPublicationsProf Shuiqing Li
Laser based investigation of the transition from droplets to nanoparticles in flame assisted spray synthesis of functional nanoparticles Proceedings of the Combustion Institute 36 1 2017
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Field Assisted Sintering SpringerLink
The book describes resistance sintering high voltage consolidation sintering by low voltage electric pulses including spark plasma sintering flash sintering microwave sintering induction heating sintering magnetic pulse compaction and other field assisted sintering techniques Includes an in depth analysis of all major field assisted
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Studying the cold sintering process of zinc ferrite as an
In this research cold sintering process CSP was successfully applied for zinc ferrite A Pechini type sol gel method was used to synthesize two types of powders a single phase powder and a multiphase powder consisting of zinc ferrite hematite and zinc oxide The powders were chemically treated in 12 M solution of acetic acid in ethanol
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Synthesis and electrical field assisted sintering
The tetragonal ZrO2 nanopowders stabilized with 3 mol Y2O3 3YSZ were synthesized using a polyacrylamide gel method The mean particle size of the 3YSZ nanopowders was found to decrease with increasing molecular ratio of monomer to the precursor salt The 3YSZ nanopowders with mean particle size of 12 nm can be densified in 1 h at 800∘C by the application of a d c electrical field
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Microwave assisted reactive sintering for Al doped
Li 6 28 Al 0 24 La 3 Zr 2 O 12 Al LLZO solid electrolyte for Li ion battery was prepared by a microwave assisted reactive sintering MARS method When sintered by the MARS method the Al LLZO cubic phase formed at 1000 °C which is 100 °C lower than that in a conventional furnace sintering method
Get PriceNovel approaches for low temperature sintering of inkjet
Therefore a number of novel alternative sintering methods are listed here Low pressure argon plasma is a first example of a selective sintering technique The method which was developed by Reinhold et al Reference Reinhold Hendriks Eckardt Kranenburg Perelaer Baumann and Schubert 24 exposes the printed features to a low pressure argon
Get PriceStudying the cold sintering process of zinc ferrite as an
In this research cold sintering process CSP was successfully applied for zinc ferrite A Pechini type sol gel method was used to synthesize two types of powders a single phase powder and a multiphase powder consisting of zinc ferrite hematite and zinc oxide The powders were chemically treated in 12 M solution of acetic acid in ethanol
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Materials Research in Israel Advanced Materials Vol 30
Proposed mechanisms for flash sintering FS are presented and discussed A new approach for the spark plasma sintering SPS mechanism as well as novel EFAS applications plasma and flame assisted FS room temperature FS and ceramics joining by SPS are also presented
Get PriceFlash assisted synthesis and densification of five
Flash sintering is an alternative sintering/synthesis technique involving the application of an electric field with simultaneous furnace heating In the most basic form the flash sintering apparatus consists of a furnace and a DC power supply attached to the specimen
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US Patent for Polymer coatings Patent Patent # 6 939 576
Flame assisted flash sintering Skip to Description Claims References Cited Patent History Patent History Such methods include flame treatment typically heating the coating to ° C oven treatment also to ° C UV cure plasma cure or microwave cure The post curing is a polysiloxane degradation
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Flame‐assisted flash sintering A noncontact method to
This new technique called Flame assisted flash sintering FAFS utilizes a flame as both a heating source and a conformal current carrying top electrode to facilitate flash sintering Using this method Yttria stabilized Zirconia 8 mol Y 8YSZ coatings are sintered onto stainless steel substrates to controlled degrees of porosity in rapid fashion
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Full article Review of flash sintering materials
Flash sintering FS is an energy efficient sintering technique involving electrical Joule heating which allows very rapid densification <60 s of particulate materials Since the first publication on flash sintered zirconia 3YSZ in 2010 it has been intensively researched and
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Journal of the American Ceramic Society Vol 101 No 2
Flame assisted flash sintering A noncontact method to flash sinter coatings on conductive substrates Stephen L Johnson Ganesh Venugopal Andrew T Hunt Pages
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Closed loop optimized nanometal sintering method
The proposed method is efficient and cost effective for flash sintering Further the sintering state monitoring system referred to herein is not limited to processes with flash sintering and silver nanoparticle inks but it can also be widely used in heating and sintering and for laser sintering
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Flash microwave pressing of zirconia
opment Compared to resistive flash sintering microwave flash sintering enables a contactless and volumetric trans mission of heat through microwave 25‒27 Using high field resonant configurations it is even possible to initiate flash sintering at room temperature13 and heat dielectric mate rials which are normally nearly impossible to
Get PriceThe History of Spark Plasma Sintering and Other Advanced
The following is an excerpt from BCC Research Report Global Markets for Spark Plasma Sintering and Other Advanced Sintering Technologies by Margareth Gagliardi The origin of spark plasma sintering is currently attributed to Arthur G Bloxam an English scientist who in 1906 developed the first direct current DC resistance sintering system for fabrication of electric incandescence lamp
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Flame assisted flash sinteringnGimat Co
An electrical current is used to cause a plasma produced through the flame resulting in a combined energy and temperature profile sufficient for inorganic powder powder and powder substrate bonding This method is referred to as flame assisted flash sintering FAFS
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Flash sintering of ceramicsScienceDirect
The first AC flash sintering experiments were carried out in 2011 by Muccillo et al on 8YSZ using frequencies in the range 60–1000 Hz reaching a final relative density of about 94 at 900 °C the same year the first work on non ionically conductive material was also carried out Cologna et al analyzed the flash sintering behavior of pure and MgO doped alumina pointing out that the
Get PriceA general method to synthesize and sinter bulk ceramics in
Synthesizing ceramics can require heating for long times at high temperatures making the screening of high through put materials challenging C Wang et al developed a new ceramic sintering technique that uses resistive heating of thin carbon strips to ramp up and ramp down temperature quickly This method allows for the quick synthesis of a wide variety of ceramics while mitigating the loss
Get PriceThe scientific questions and technological opportunities
Moreover a contactless flash sintering method using plasma electrodes has been developed Most recently a flame assisted flash sintering has also been developed as a noncontact method to densify coatings on conductive substrates Yet another extension is represented by flash microwave sintering
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Millisecond photonic sintering of iron oxide doped alumina
The ultrafast sintering method presented in this work enables total sintering times of a few seconds and heating rates of 10 8 K/min which is more than four orders of magnitude faster than those
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A general method to synthesize and sinter bulk ceramics in
Synthesizing ceramics can require heating for long times at high temperatures making the screening of high through put materials challenging C Wang et al developed a new ceramic sintering technique that uses resistive heating of thin carbon strips to ramp up and ramp down temperature quickly This method allows for the quick synthesis of a wide variety of ceramics while mitigating the loss
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Flame Synthesis of Valuable Nanoparticles Recent Progress
Flame synthesis of carbon nanotubes and few layer graphene on metal oxide spinel powders Carbon 2013 63 DOI 10 1016/j carbon 2013 07 023 Aamir D Abid Masakazu Kanematsu Thomas M Young Ian M Kennedy Arsenic Removal from Water Using Flame Synthesized Iron Oxide Nanoparticles with Variable Oxidation States
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Flash sintering A new frontier in defect physics and
Interest in ultrafast sintering has been expanding from different directions that include not only electric and electromagnetic field driven accelerations but also the influence of heating rates Among them the electrical method of flash sintering is most quantitative and therefore most amenable to manufacturing The electric field the current density and temperature can be explicitly
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Flame‐assisted flash sintering A noncontact method to flash sinter coatings on conductive substrates Tingting Wei Zetan Liu Donglou Ren Xiangong Deng Qihuang Deng Qing Huang Songlin Ran Songlin Ran Facile synthesis and spectroscopic characterization of siliconitride phosphors for white light‐emitting diodes
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Synthesis and electrical field assisted sintering
The tetragonal ZrO2 nanopowders stabilized with 3 mol Y2O3 3YSZ were synthesized using a polyacrylamide gel method The mean particle size of the 3YSZ nanopowders was found to decrease with increasing molecular ratio of monomer to the precursor salt The 3YSZ nanopowders with mean particle size of 12 nm can be densified in 1 h at 800∘C by the application of a d c electrical field
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Ultrafast synthesis of entropy stabilized oxide at room
To be noticed compared to the conventional sintering technique the time for full conversion to Mg 0 2 Ni 0 2 Co 0 2 Cu 0 2 Zn 0 2 O by reaction assisted flash sintering was in just a few seconds which was two orders of magnitude lower than the conventional sintering The full conversion time for flash sintering is also at least five times
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Flash sintering A new frontier in defect physics and
The clay object must be fired at a high temperature typically between 500 and 200°C for a few hours a process now known as sintering Early humans may have discovered it accidentally by a clay object falling into a fire and emerging remarkably strong dense and though shrunken retaining its
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