Various thermal parameters investigation of 3C-SiC nanoparticles at the different heating rates

2022 ◽  
Vol 128 (2) ◽  
Author(s):  
Elchin M. Huseynov ◽  
Tural G. Naghiyev
Keyword(s):  
Thermal Parameters ◽  
Heating Rates ◽  
Sic Nanoparticles

scholarly journals Various Thermal Coefficients İnvestigation of 3C-Sic Nanoparticles at the Different Heating Rates

2021 ◽  
Author(s):  
Elchin Huseynov ◽  
Tural G. Naghiyev
Keyword(s):  
Silicon Carbide ◽  
Thermal Processing ◽  
Theoretical Calculations ◽  
Nanocrystalline Silicon ◽  
Hydroxyl Groups ◽  
Heating Rates ◽  
Sic Nanoparticles ◽  
Thermophysical Parameters ◽  
Sic Particles ◽  
Nanocrystalline Silicon Carbide

Abstract Several thermal parameters were analyzed for nanocrystalline silicon carbide (3C-SiC) particles at the performed depending on the thermal processing rate. The hydroxyl groups on the surface of nanocrystalline 3C-SiC particles have been investigated as a function of temperature and heating rate. Specific heat capacity and Gibbs energy of silicon carbide nanoparticles have been determined in the temperature range of 300 ÷ 1270K at the various heating rates. The enthalpy and the entropy were calculated at different thermal processing rates (theoretical calculations are confirmed based on experimental results). Experminetal results obtained for all thermophysical parameters were comparatively studied at different thermal processing rates.PACS: 61.46.+w, 65.80.+n, 67.80.Gb

Comparing fast inductive tempering and conventional tempering: Effects on microstructure and mechanical properties

2018 ◽  
Vol 115 (4) ◽  
pp. 407 ◽  
Author(s):  
Annika Eggbauer Vieweg ◽  
Gerald Ressel ◽  
Peter Raninger ◽  
Petri Prevedel ◽  
Stefan Marsoner ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Energy ◽  
Charpy Impact ◽  
Heat Treating ◽  
Processing Route ◽  
High Heating Rate ◽  
Heating Rates ◽  
High Heating ◽  
Tempering Treatment ◽  
Carbide Distribution

Induction heating processes are of rising interest within the heat treating industry. Using inductive tempering, a lot of production time can be saved compared to a conventional tempering treatment. However, it is not completely understood how fast inductive processes influence the quenched and tempered microstructure and the corresponding mechanical properties. The aim of this work is to highlight differences between inductive and conventional tempering processes and to suggest a possible processing route which results in optimized microstructures, as well as desirable mechanical properties. Therefore, the present work evaluates the influencing factors of high heating rates to tempering temperatures on the microstructure as well as hardness and Charpy impact energy. To this end, after quenching a 50CrMo4 steel three different induction tempering processes are carried out and the resulting properties are subsequently compared to a conventional tempering process. The results indicate that notch impact energy raises with increasing heating rates to tempering when realizing the same hardness of the samples. The positive effect of high heating rate on toughness is traced back to smaller carbide sizes, as well as smaller carbide spacing and more uniform carbide distribution over the sample.

Calculation of thermal parameters of frozen soil based on the closely spaced soil column model

2017 ◽  
Vol 34 (4) ◽  
pp. 393
Author(s):  
Zhixiang Chen ◽  
Shunqun Li ◽  
Jinhong Xia ◽  
Kai Wang ◽  
Chao Gui
Keyword(s):  
Soil Column ◽  
Frozen Soil ◽  
Thermal Parameters ◽  
Column Model

Non-Isothermal Decomposition Kinetic of Polypropylene/Hydrotalcite Composite

2019 ◽  
Vol 19 (11) ◽  
pp. 7493-7501 ◽  
Author(s):  
Sheng Xu ◽  
Min Zhang ◽  
Siyu Li ◽  
Moyu Yi ◽  
Shigen Shen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Nitrogen Atmosphere ◽  
Heating Rates ◽  
Decomposition Reactions ◽  
Kinetic And Thermodynamic Parameters ◽  
Málek Method ◽  
Boundary Reaction ◽  
Phase Boundary Reaction ◽  
Thermal Stability Of

P3O5-10 pillared Mg/Al hydrotalcite (HTs) as a functional fire-retarding filler was successfully prepared by impregnation-reconstruction, where the HTs was used to prepare polypropylene (PP) and HTs composite (PP/HTs). Thermal decomposition was crucial for correctly identifying the thermal behavior for the PP/HTs, and studied using thermogravimetry (TG) at different heating rates. Based on single TG curves and Málek method, as well as 41 mechanism functions, the thermal decompositions of the PP/HTs composite and PP in nitrogen atmosphere were studied under non-isothermal conditions. The mechanism functions of the thermal decomposition reactions for the PP/HTs composite and PP were separately “chemical reaction F3” and “phase boundary reaction R2,” which were also in good agreement with corresponding experimental data. It was found that the addition of the HTs increased the apparent activation energy Ea of the PP/HTs comparing to the PP, which improved the thermal stability of the polypropylene. A difference in the set of kinetic and thermodynamic parameters was also observed between the PP/HTs and PP, particularly with respect to lower ΔS≠ value assigned to higher thermal stability of the PP/HTs composite.

An Investigation on Devolatilization Characteristics of Pulverized Corn Stalk at Flash Heating Rates

2004 ◽  
Author(s):  
Weiming ◽  
YI. ◽  
Xueyuan ◽  
BAI. ◽  
Zhihe ◽  
...  
Keyword(s):  
Corn Stalk ◽  
Heating Rates

Analytical Expressions for the Mixed-Order Kinetics Parameters of TL Glow Peaks Based on the two Heating Rates Method

2018 ◽  
Vol 28 (2) ◽  
pp. 597-603 ◽  
Author(s):  
Mufeed Maghrabi ◽  
Tariq Al-Abdullah ◽  
Ziad Khattari
Keyword(s):  
Heating Rates ◽  
Kinetics Parameters ◽  
Mixed Order ◽  
Analytical Expressions
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