Effects of Ni-Ti-Cu alloy composition and heat treatment temperature after cold working on phase transformation characteristics

1992 ◽  
Vol 27 (8) ◽  
pp. 2199-2204 ◽  
Author(s):  
K. Tsuji ◽  
K. Nomura
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Heat Treatment Temperature ◽  
Cold Working ◽  
Alloy Composition ◽  
Treatment Temperature ◽  
Cu Alloy

Phase Transformation, Microstructure and Hardness of Electrodeposited Fe-Based Amorphous Coatings

2011 ◽  
Vol 467-469 ◽  
pp. 365-368
Author(s):  
Yun Ying Fan ◽  
Ye Hua Jiang ◽  
Rong Zhou
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Corrosion Resistance ◽  
Phase Transformation ◽  
Heat Treatment Temperature ◽  
High Hardness ◽  
Treatment Temperature ◽  
Dispersed Phase ◽  
Good Corrosion Resistance ◽  
Amorphous Coatings

Fe-based amorphous coatings have many excellent performances, such as good corrosion resistance, high hardness, satisfactory magnetism, etc. In this paper, Fe-P amorphous coatings were prepared by electrodeposition method, and the phase transformation, microstructure, and hardness of the coatings heated at different heat-treatment temperature were investigated. The results show that Fe-P amorphous coatings begin to crystallize when heated at 300°C, the α-Fe(P) solid solution appears when heated at 330°C, and FexP(X=1,2,3) compounds separate out from the solid solution when heat-treatment temperature is up to 370°C. During the process of heat-treatment, hardness of the Fe-P coating increases as the reinforcement result of solid solution and dispersed phase in the coatings, and the hardness reaches the maximum 1100 HV at 370°C. When heat-treatment temperature is higher than 460°C, dispersed phase in the coatings will grow up, which is called Ostwald Coarsening Phenomenon, and hardness of the coating decreases quickly.

Phase Transformation of Coal at High Temperature

2014 ◽  
Vol 809-810 ◽  
pp. 815-821
Author(s):  
Xiao Hu Hua ◽  
Xiao Gang Wang ◽  
Jia Qing Yang ◽  
Shu He Lu ◽  
Li Rong Deng ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Phase Composition ◽  
High Temperature ◽  
Internal Migration ◽  
Heat Treatment Temperature ◽  
Functional Group ◽  
Treatment Temperature ◽  
Conductive Phase ◽  
Higher Temperature

Anthracite and bitumite were processed respectively at 1400°C,1700°C, 2000°C, 2200°C, 2400°C and 2600°C,and their chemical composition,resistivity,microstructure, phase composition,and the internal migration of molecular functional group were tested and characterized. The results indicate that moisture, ash and volatile in coal have gradually shifted and lost with the elevation of heat treatment temperature, while the higher temperature, the quicker and completer phase change. Heat treatment can make the coal transform from approximately insulative phase to conductive phase,. Furthermore, as the temperature increases, the conductive phase transformation effect is better. The higher the heat treatment temperature of coal, the more amorphous carbon transforming into crystalline carbon completely, but the less types of phases .

scholarly journals Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

2020 ◽  
Vol 10 (14) ◽  
pp. 4940
Author(s):  
Muhammad Faris Syazwan Mohd Shofri ◽  
Mohd Hafiz Mohd Zaid ◽  
Khamirul Amin Matori ◽  
Yap Wing Fen ◽  
Yazid Yaakob ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Silicate Glass ◽  
Glass Ceramic ◽  
Heat Treatment Temperature ◽  
Glass Ceramics ◽  
Linear Shrinkage ◽  
Treatment Temperature ◽  
Glass System ◽  
Zinc Silicate

A new transparent zinc silicate glass-ceramic was derived from the 55ZnO–5B2O3–40SLS glass system via a controlled heat-treatment method. The precursor glass sample was placed through the heat-treatment process at different temperatures to study the progress in phase transformation, optical performance and emission intensity of the zinc silicate glass-ceramics. For this project, material characterization was measured through several tests using densimeter and linear shrinkage measurement, X-ray diffraction (XRD), Fourier transform infrared reflection (FTIR), ultraviolet–visible (UV–Vis) and photoluminescence (PL) spectroscopy. The density and linear shrinkage measurements show that the density of the particular glass-ceramic samples increases with the progression of heating temperature. The XRD analysis displays the result in which the zinc silicate crystal starts to grow after the sample was treated at 700 °C. In addition, the FTIR spectra indicated that the crystallization of the zinc silicate phase occurred with the appearance of SiO4, ZnO4 and Si-O-Zn bands. UV–visible exhibited the small changes when the value for the optical band gap decreased from 3.867 to 3.423 eV, influenced by the temperature applied to the sample. Furthermore, the PL spectroscopy showed an enhancement of broad green emission at 534 nm upon the increased heat-treatment temperature. Thus, it can be concluded there is the progression of crystal growth as the heat-treatment temperature increased; three emission peaks appeared at 529, 570 and 682 nm for the green, yellow and red emissions, respectively.

Characterization of Phase Transformation and Shape Memory Behavior of Ti-Ni 54.4 wt(%) by Heat and Thermal Treatments

2010 ◽  
Author(s):  
Cristina Urbina ◽  
Silvia De la Flor ◽  
Francesc Gispert-Guirado ◽  
Albert Fabregat ◽  
Francesc Ferrando
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Thermal Cycling ◽  
Heat Treatment Temperature ◽  
Rietveld Method ◽  
Weight Fraction ◽  
Treatment Temperature ◽  
Phase Development ◽  
Heat Treated ◽  
Suitable Combination

The objective of the study was to quantify changes in the phase transformation behavior in NiTi SMA wires when they are heat treated and thermally cycled at zero stress. The analysis involved weight fraction evolution derived from XRD profiles using the Rietveld method and specific software. The results were compared with those obtained from ER measurements. The study then analyzed how both treatments affect the SMA hardness. The results show how R-phase presence decreases with the increase in heat treatment temperature and indicate that the R-phase is developed or stabilized by thermal cycling depending on the heat treatment temperature. The SMA hardness increases due to thermal cycling. The increase is greater if there has been no R-phase development during the heat treatment. Combining the results of these techniques is deemed to be the most suitable combination of heat treatment and thermal cycling by which to improve the SMA’s functional properties.

Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels

2013 ◽  
Vol 27 (10) ◽  
pp. 1079-1083
Author(s):  
Zhao-Hui LIU ◽  
Gen-Liang HOU ◽  
Xun-Jia SU ◽  
Feng GUO ◽  
Zhou XIAO ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Composite Aerogels

Spin-dependent-magnetoresistance control by regulation of heat treatment temperature for magnetite nano-particle sinter

2009 ◽  
Vol 18 (12) ◽  
pp. 935-938
Author(s):  
H. Kobori ◽  
T. Asahi ◽  
Y. Yamasaki ◽  
A. Sugimura ◽  
T. Taniguchi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Nano Particle

scholarly journals Water Resistance and Creep Behavior of Heat-Treated Moso Bamboo Determined by the Stepped Isostress Method

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1264
Author(s):  
Teng-Chun Yang ◽  
Tung-Lin Wu ◽  
Chin-Hao Yeh
Keyword(s):  
Heat Treatment ◽  
Water Absorption ◽  
Creep Behavior ◽  
Heat Treatment Temperature ◽  
Water Resistance ◽  
Absorption Efficiency ◽  
Treatment Temperature ◽  
Moso Bamboo ◽  
Phyllostachys Pubescens ◽  
Heat Treated

The influence of heat treatment on the physico-mechanical properties, water resistance, and creep behavior of moso bamboo (Phyllostachys pubescens) was determined in this study. The results revealed that the density, moisture content, and flexural properties showed negative relationships with the heat treatment temperature, while an improvement in the dimensional stability (anti-swelling efficiency and anti-water absorption efficiency) of heat-treated samples was observed during water absorption tests. Additionally, the creep master curves of the untreated and heat-treated samples were successfully constructed using the stepped isostress method (SSM) at a series of elevated stresses. Furthermore, the SSM-predicted creep compliance curves fit well with the 90-day full-scale experimental data. When the heat treatment temperature increased to 180 °C, the degradation ratio of the creep resistance (rd) significantly increased over all periods. However, the rd of the tested bamboo decreased as the heat treatment temperature increased up to 220 °C.

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