scholarly journals Crystallization of Zr50Cu40Al10 Metallic Glass by Rapid Heating Process

2009 ◽  
Vol 58 (3) ◽  
pp. 205-208 ◽  
Author(s):  
Shuo ZHANG ◽  
Tetsu ICHITSUBO ◽  
Eiichiro MATSUBARA ◽  
Yoshihiko YOKOYAMA ◽  
Tokujiro YAMAMOTO
Keyword(s):  
Metallic Glass ◽  
Rapid Heating ◽  
Heating Process

scholarly journals Properties and Developments of Combustion and Gasification of Coal and Char in a CO2-Rich and Recycled Flue Gases Atmosphere by Rapid Heating

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Zhigang Li ◽  
Xiaoming Zhang ◽  
Yuichi Sugai ◽  
Jiren Wang ◽  
Kyuro Sasaki
Keyword(s):  
Coal Gasification ◽  
Radiative Heat ◽  
Arrhenius Equation ◽  
Rapid Heating ◽  
Volatile Matter ◽  
Heating Process ◽  
Mass Ratio ◽  
Coal Oxidation ◽  
Transfer Condition ◽  
Coal Temperature

Combustion and gasification properties of pulverized coal and char have been investigated experimentally under the conditions of high temperature gradient of order 200°C·s−1by a CO2gas laser beam and CO2-rich atmospheres with 5% and 10% O2. The laser heating makes a more ideal experimental condition compared with previous studies with a TG-DTA, because it is able to minimize effects of coal oxidation and combustion by rapid heating process like radiative heat transfer condition. The experimental results indicated that coal weight reduction ratio to gases followed the Arrhenius equation with increasing coal temperature; further which were increased around 5% with adding H2O in CO2-rich atmosphere. In addition, coal-water mixtures with different water/coal mass ratio were used in order to investigate roles of water vapor in the process of coal gasification and combustion. Furthermore, char-water mixtures with different water/char mass ratio were also measured in order to discuss the generation ratio of CO/CO2, and specified that the source of Hydrocarbons is volatile matter from coal. Moreover, it was confirmed that generations of CO and Hydrocarbons gases are mainly dependent on coal temperature and O2concentration, and they are stimulated at temperature over 1000°C in the CO2-rich atmosphere.

Polyhedral Gold Nanoplate: High Fraction Synthesis of Two-Dimensional Nanoparticles through Rapid Heating Process

2008 ◽  
Vol 8 (8) ◽  
pp. 2638-2645 ◽  
Author(s):  
Jong-Hee Lee ◽  
Kai Kamada ◽  
Naoya Enomoto ◽  
Junichi Hojo
Keyword(s):  
Rapid Heating ◽  
Heating Process ◽  
Two Dimensional ◽  
High Fraction

scholarly journals Effect of rapid heating process in hot stamping on compact strip production hot rolled plate

2018 ◽  
Vol 15 ◽  
pp. 1055-1061
Author(s):  
Bin Zhu ◽  
Jia Zhu ◽  
Zhoujie Zhu ◽  
Yilin Wang ◽  
Yisheng Zhang
Keyword(s):  
Rapid Heating ◽  
Hot Stamping ◽  
Rolled Plate ◽  
Heating Process ◽  
Compact Strip Production ◽  
Hot Rolled ◽  
Strip Production

Refinement of Cementite in High Strength Steel Plates by Rapid Heating and Tempering

2007 ◽  
Vol 539-543 ◽  
pp. 4720-4725 ◽  
Author(s):  
A. Nagao ◽  
K. Hayashi ◽  
K. Oi ◽  
S. Mitao ◽  
N. Shikanai
Keyword(s):  
Rapid Heating ◽  
High Strength ◽  
Average Diameter ◽  
Carbon Steels ◽  
Steel Plates ◽  
Heating Process ◽  
Low Carbon ◽  
Precipitation Behavior ◽  
Heating Rates ◽  
Extraction Replica

The precipitation behavior of cementite in low carbon steels at various heating rates from 0.3 to 100 K/s has been studied using a high-frequency induction heating apparatus. The materials used in this study were steel platesfor welded structures: 610 and 780 MPa class steel plates with a mixed microstructure of bainite and martensite.Cementite was observed using a carbon extraction replica method and the hardness and toughness were also examined. When heated at the conventional slow rate of 0.3 K/s, relatively large cementite particles with an average diameter of 72 nm precipitated at the lath boundaries, whereas when heated at a rapid rate over 3.0 K/s, cementite precipitated both within the laths and at the lath boundaries, and the cementite was refined down to an average diameter of 54 nm. With such refinement of the cementite, the toughness was improved. On the other hand, the hardness was irrespective of the heating rate and was dependent on the tempering parameter. TEM observations of the cementite precipitation behavior during the rapid heating process revealed that cementite begins to precipitate at the lath boundaries at about 773 K and within the laths at about 873 K. It is concluded that rapid heating especially from 773 to 873 K contributes to the cementite refinement and consequently the improvement in toughness. The effect of alloying elements such as chromium, molybdenum or silicon on the cementite growth during the rapid heating and tempering treatment is also discussed.

Transient Thermal Analysis for Rapid Thermal Processing of GaAs

1988 ◽  
Vol 144 ◽  
Author(s):  
F. K. Yang ◽  
S. J. Pien ◽  
R. Kwor
Keyword(s):  
Thermal Analysis ◽  
Silicon Dioxide ◽  
Oxide Layer ◽  
Thermal Processing ◽  
Rapid Heating ◽  
Rapid Thermal Processing ◽  
Doping Effect ◽  
Heating Process ◽  
Light Sources ◽  
Transient Thermal

ABSTRACTA thermal analysis is performed to simulate the rapid heating process for ion implanted GaAs with consideration of the doping effect. The results are for cases with various concentrations and thicknesses of doping layer. Also studied are the heating processes for silicon dioxide capped GaAs. The effects of the thickness of the oxide layer are discussed. The magnitude of the temperature differences across the wafer is addressed. The present analysis considers xenon-arc lamps and tungsten-halogen lamps as the light sources.

A Simple Method for Fabrication of Mesoporous Films Using a Rapid Heating Process

2005 ◽  
Vol 34 (3) ◽  
pp. 328-329 ◽  
Author(s):  
Takeo Yamada ◽  
Haoshen Zhou ◽  
Itaru Honma ◽  
Yuko Ueno ◽  
Tsutomu Horiuchi ◽  
...  
Keyword(s):  
Rapid Heating ◽  
Heating Process ◽  
Mesoporous Films ◽  
Simple Method

scholarly journals Preparing High-Purity Anhydrous ScCl3 Molten Salt Using One-Step Rapid Heating Process

2020 ◽  
Vol 10 (15) ◽  
pp. 5174
Author(s):  
Junhui Xiao ◽  
Chao Chen ◽  
Wei Ding ◽  
Yang Peng ◽  
Kai Zou ◽  
...  
Keyword(s):  
Molten Salt ◽  
High Purity ◽  
Rapid Heating ◽  
Raw Material ◽  
Hydrolysis Rate ◽  
Heating Process ◽  
Crystal Water ◽  
Argon Flow ◽  
One Step ◽  
Scandium Chloride

In this study, a one-step rapid heating novel process was used to prepare high-purity anhydrous scandium chloride molten salt with low-purity scandium oxide. High-purity anhydrous ScCl3 molten salt was used as the Sc-bearing raw material for preparing the Sc-bearing master alloy. Inert gas was used to enhance the purity of anhydrous scandium chloride and reduce the hydrolysis rate of scandium. The results show that high-purity scandium chloride (purity, 99.69%) with the scandium content of 29.61%, was obtained, and the hydrolysis rate of scandium was 1.19% under the conditions used: removing ammonium chloride; residual crystal water temperature of 400 °C; m(Sc2O3):m(NH4Cl) = 1:2.5; holding-time of 90 min; heating-rate of 12 °C/min; and argon flow of 7.5 L/min. XRD, SEM, and EPMA analyses further verified that anhydrous scandium chloride crystallization condition was relatively good and the purity of high-purity anhydrous scandium chloride approached the theory purity of anhydrous scandium chloride.

scholarly journals Effect of Microstructure on Post-Rolling Induction Treatment in a Low C Ti-Mo Microalloyed Steel

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 694 ◽  
Author(s):  
Gorka Larzabal ◽  
Nerea Isasti ◽  
Jose Rodriguez-Ibabe ◽  
Pello Uranga
Keyword(s):  
Hot Rolling ◽  
Microalloyed Steel ◽  
Rapid Heating ◽  
Laboratory Simulation ◽  
Thin Strip ◽  
Induction Treatment ◽  
Heating Process ◽  
Low Carbon ◽  
Optimization Strategy ◽  
Hot Rolled

Cost-effective advanced design concepts are becoming more common in the production of thick plates in order to meet demanding market requirements. Accordingly, precipitation strengthening mechanisms are extensively employed in thin strip products, because they enhance the final properties by using a coiling optimization strategy. Nevertheless, and specifically for thick plate production, the formation of effective precipitation during continuous cooling after hot rolling is more challenging. With the aim of gaining further knowledge about this strengthening mechanism, plate hot rolling conditions were reproduced in low carbon Ti-Mo microalloyed steel through laboratory simulation tests to generate different hot-rolled microstructures. Subsequently, a rapid heating process was applied in order to simulate induction heat treatment conditions. The results indicated that the nature of the matrix microstructure (i.e., ferrite, bainite) affects the achieved precipitation hardening, while the balance between strength and toughness depends on the hot-rolled microstructure.

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