Liquidus temperature determination of the Fe–Co–Cu system in the Fe-rich corner by thermal analysis

2008 ◽  
Vol 461 (1-2) ◽  
pp. 178-182 ◽  
Author(s):  
W. Banda ◽  
G.A. Georgalli ◽  
C. Lang ◽  
J.J. Eksteen
Keyword(s):  
Thermal Analysis ◽  
Liquidus Temperature ◽  
Temperature Determination

Liquidus Temperature of Mould Fluxes in Casting of Ti-stablized Stainless Steel

2013 ◽  
Vol 32 (3) ◽  
pp. 281-286 ◽  
Author(s):  
Qifeng Shu ◽  
Zhen Wang ◽  
Kuochih Chou
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Stainless Steel ◽  
Differential Thermal Analysis ◽  
Liquidus Temperature ◽  
Temperature Determination ◽  
Dta Curves ◽  
Liquidus Temperatures

AbstractLiquidus temperatures of mould fluxes for casting of Ti-stabilized stainless steel were determined by differential thermal analysis (DTA) techniques in the present work. Multiple DTA curves were employed to guarantee better accuracy for liquidus temperature determination. To investigate effect of compositions change on solidification of mould fluxes during casting of Ti-stabilized stainless steel, changes of liquidus and solidus temperatures with TiO2 substitution for SiO22 in mould fluxes were studied. It was found that TiO2 substitution for SiO22 in mould fluxes would lead to decrease of liquidus temperature. Thermodynamic package FactSage was also employed to calculate the liquidus temperature of mould fluxes. The calculated results were compared with experimental data, and discrepancy between calculated and experimental liquidus temperatures was discussed.

scholarly journals Interrupted heating DTA for liquidus temperature determination of Ag–Cd–In alloys

2018 ◽  
Vol 135 (4) ◽  
pp. 2209-2219 ◽  
Author(s):  
Kasi Gajavalli ◽  
Georges Mikaelian ◽  
Marc Barrachin ◽  
Alexandre Decreton ◽  
Evelyne Fischer ◽  
...  
Keyword(s):  
Liquidus Temperature ◽  
Temperature Determination

Applications of Thermal Analytical Procedures in the Study of Elastomers and Elastomer Systems

1980 ◽  
Vol 53 (3) ◽  
pp. 437-511 ◽  
Author(s):  
D. W. Brazier
Keyword(s):  
Thermal Analysis ◽  
Dynamic Properties ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
International Standards ◽  
New Technique ◽  
Heating Rates ◽  
Single Experiment ◽  
Rubber Compounds

Abstract An attempt has been made to review the development of thermoanalytical procedures as they have been applied to elastomers and elastomer systems over the past 10 years. For all rubber industry products, temperature and its effects, either alone or in conjunction with the chemical environment, play an important role from the production stage through to the final failure of the product in the field. It is thus not surprising that thermal analysis, in which temperature is the prime variable, has found such diverse applications in elastomer studies. The identification and quantitative analysis of rubber formulations have received most attention. Such formulations produce characteristic “fingerprints” when studied in DTA, DSC, TG, or TMA. In DSC, the determination of the glass transition characteristics, the observation and determination of crystallinity, the detection of cyclization reactions, and the monitoring of thermal and oxidative degradation characteristics can all be observed in a single experiment covering the temperature range from −150 to +600°C. At normal heating rates, e.g., 20°C/min, such information is available in 40 min. TG/DTG analysis can yield the elastomer or elastomers content, oil and plasticizer, carbon black (level and often type), and inorganic ash in less than 60 min. Processing and curing can also be studied. Blend compatibility can be assessed on the basis of both Tg and crystallinity measurements and the data used to determine optimum mixing times. Sulfur vulcanization and peroxide curing of elastomers is readily monitored by DSC and can be used for confirmation analysis of the presence of curatives. Limitations in such analysis exist, but as understanding and ability to interpret cure exotherms increase, valuable information about the mechanism and the nature of the cured network will be obtained. The testing of rubber compounds involves many hours of labor by current procedures. The rapidity of thermal analysis promises to offer some relief. In addition to DSC and TG, TMA, a relatively new technique, offers a rapid approach to low-temperature testing. Dynamic mechanical analysis (DMA) offers a rapid route to determining dynamic properties, but as yet, relatively little has been published on the application of this new technique to elastomers. As environmental concern increases, techniques such as evolved gas analysis (EGA) and combined techniques such as TG/gas chromatography are predicted to play an important role. As for the future, it is readily apparent that the principles of the methods have been established and, in several cases, it now remains to reduce them to a practical level. In some areas, such as vulcanization studies, much remains to be undertaken to improve our interpretive skills. Although there is some indication that certain industries have produced “in-house” standards for the analysis of rubber compounds by DSC and TG/DTG, it will only be when national and international standards organizations study and produce standard procedures, that the techniques will be generally adopted. Maurer's prediction in 1969 of increased applications of DTA and TG in elastomer studies has undoubtedly proved correct, and with the proliferation of reliable commercial instrumentation, significant developments can be anticipated in the next decade.

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