Investigation on mechanical and thermal properties of HTPE/PCL propellant for wide temperature range use

2021 ◽  
Author(s):  
Shen Yuan ◽  
Bowen Zhang ◽  
Xiaomu Wen ◽  
Keke Chen ◽  
Shengkun Jiang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Wide Temperature Range ◽  
Mechanical And Thermal Properties ◽  
Temperature Range ◽  
Range Use

Mechanical and thermal properties of the glassy semiconductor chlorinated Se0 997As0 003 used as an X-ray imaging material

1989 ◽  
Vol 67 (7) ◽  
pp. 686-693 ◽  
Author(s):  
S. O. Kasap ◽  
S. Yannacopoulos
Keyword(s):  
Thermal Properties ◽  
Structural Changes ◽  
Relaxation Times ◽  
Thermal Relaxation ◽  
Mechanical And Thermal Properties ◽  
Debye Relaxation ◽  
X Ray ◽  
Temperature Range ◽  
Glass Transformation ◽  
X Ray Imaging

Mechanical and thermal properties of a typical X-ray imaging material amorphous Se0.997As0.003, chlorinated in the ppm range were investigated using thermal microhardness analysis (TμHA) and differential scanning calorimetry (DSC). The experiments were carried out over a temperature range encompassing the glass transformation to study the nature of structural changes controlling the mechanical and thermal properties. It is shown that the mechanical property microhardness when examined on an Itoh–Shishokin plot of log Vickers hardness number (VHN) vs. temperature (T) exhibits a hardness transition temperature, Tg*, in the glass transformation region. The rates of relaxation of the mechanical and thermal properties in the glass transformation region were studied by investigating the heating rate dependence of the glass transition temperatures, Tg* and Tg, defined empirically on the log VHN vs. T behavior and the DSC glass transformation endotherm, respectively. By applying the present thermoanalytical methods, it has proved possible to identify a typical Vogel–Tammann–Fulcher type of behavior in the mechanical and thermal relaxation times that correlates remarkably well with the viscosity–temperature data of M. Cukierman and D. R. Uhlmann (J. Non-Cryst. Solids, 12, 199 (1973)) as well as the dielectric loss experiments of M. Abkowitz, D. F. Pochan, and J. M. Pochan (J. Appl. Phys. 51, 1539 (1980)). The latter had previously exposed a Williams–Landel–Ferry relation for the Debye relaxation times in a-Se and a-Se: 1% As. It is therefore concluded that the behavior of mechanical, thermal, and dielectric properties of a-Se0997As0003 in the glass transformation region is inversely proportional to the viscosity, which in turn can be adequately described over a temperature range above ~30 °C by a Vogel expression.

scholarly journals Computational Determination of Macroscopic Mechanical and Thermal Material Properties for Different Morphological Variants of Cast Iron

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1588
Author(s):  
Christoph Herrmann ◽  
Stefan Schmid ◽  
Daniel Schneider ◽  
Michael Selzer ◽  
Britta Nestler
Keyword(s):  
Thermal Properties ◽  
Cast Iron ◽  
Synthetic Approach ◽  
Mechanical And Thermal Properties ◽  
Data Infrastructure ◽  
Temperature Range ◽  
Young’S Moduli ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Morphological Variants

The sensitivity of macroscopic mechanical and thermal properties of grey cast iron is computationally investigated for a variety of graphite morphologies over a wide temperature range. In order to represent common graphite morphologies according to EN ISO 945-1, a synthetic approach is used to algorithmically generate simulation domains. The developed mechanical and thermal model is applied in a large simulation study. The study includes statistical volume elements of the graphite morphology classes GJL-150 and IA2 to IA5, with 10, 11 and 12  v.−% of graphite precipitations, respectively, for a temperature range from 20 to 750 °C. Homogenised macroscopic quantities, such as the Young’s moduli, Poisson’s ratios, yield strengths and thermal conductivities, are predicted for different morphology classes by applying simulation and data analysis tools of the research data infrastructure Kadi4Mat. This is the first work to determine the mechanical and thermal properties of the morphology classes defined in EN ISO 945-1.

scholarly journals The thermal expansion of erbium over a wide temperature range

2019 ◽  
Vol 196 ◽  
pp. 00050
Author(s):  
Yurii Kozlovskii
Keyword(s):  
Experimental Data ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Thermal Expansion Coefficient ◽  
Wide Temperature Range ◽  
Linear Thermal Expansion Coefficient ◽  
Linear Thermal Expansion ◽  
Measurement Interval ◽  
Temperature Range ◽  
Study Results

A dilatometric study results on the linear thermal expansion coefficient (LTEC) of polycrystalline erbium are presented. The experimental data in the temperature range of 100–800 K are obtained. The measurements were made with an error 3%. Approximate dependencies which allow calculating the reference tables of thermal properties for the entire measurement interval are defined.

scholarly journals Glass fiber filled polyphenylenesulfide of TERMORAN©: physico-mechanical and thermal properties

2019 ◽  
pp. 52-56 ◽  
Author(s):  
A. V. Samoryadov ◽  
E. V. Kalugina ◽  
V. V. Bitt
Keyword(s):  
Thermal Properties ◽  
Glass Fiber ◽  
Thermophysical Properties ◽  
Mechanical And Thermal Properties ◽  
Temperature Range

Thermal, physico-mechanical, electro- and thermophysical properties of glass fiber filled Polyphenylene sulfides are investigated, the temperature range of products from these materials is established.

scholarly journals Determining the influence of the filler on the properties of structural thermal-resistant polymeric materials based on Phenylone C1

2021 ◽  
Vol 5 (6 (113)) ◽  
pp. 24-29
Author(s):  
Oleh Kabat ◽  
Dmytro Makarenko ◽  
Oleksii Derkach ◽  
Yevhen Muranov
Keyword(s):  
Thermal Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Silica Gel ◽  
Polymer Composite Materials ◽  
Mechanical And Thermal Properties ◽  
Original Material ◽  
Temperature Range ◽  
Study Results ◽  
Structural Plastics

This paper reports a laboratory study of the physical, mechanical, and thermal properties of designed composite materials based on Phenylone C1 filled with silica gel. Structural plastics, due to their high chemical and wear resistance, sufficient level of physical, mechanical, and thermal properties, can significantly improve the technical characteristics of machines and mechanisms. However, some structural plastics, including Phenylone C1, have a significant drawback – a narrow temperature range of their processing, which leads to a complication of technological equipment and increases the cost of production. It was established that the technical processing of the initial composite material into finished products could be improved by introducing fillers. The regularities of influence of silica gel content on the level of thermal and physical-mechanical properties of polymer composite materials based on Phenylone C1 have been established. It was found that the introduction of silica gel into Phenylone C1 leads to an increase in stress at the yield strength and modulus of elasticity at compression by 6.3 % and 13.3 %, respectively, compared to the original material. It was established that the heat resistance of the filled composite increases by 11.6 % with a decrease in thermal linear expansion by 10‒20 %, depending on the content of the filler. It was found that with an increase in silica gel concentration in the polymer matrix, the temperature of the onset of active destruction shifts towards higher temperatures. When filled in the amount of 30 % by weight, this temperature reaches 375 °C, which increases the temperature range of processing the designed material by 25 °C. The study results make it possible to optimize the system of tolerances and landings of parts made of polymer-composite materials, simplify the technology of their manufacture, and, as a result, reduce their cost

Devitrification and Recrystallization of Aqueous Glycerol and PEG-600 Solutions with Nanoparticles

2013 ◽  
Vol 853 ◽  
pp. 105-110
Author(s):  
Fu Kou Lv ◽  
Bao Lin Liu ◽  
Wei Jie Li
Keyword(s):  
Thermal Properties ◽  
The State ◽  
Experimental Results ◽  
Glycerol Solution ◽  
Mechanical And Thermal Properties ◽  
Food Manufacturing ◽  
Temperature Range ◽  
Physical Presence ◽  
Peg 600 ◽  
Ice Fraction

Nanoparticles in solution offer unique electrical, mechanical and thermal properties due to their physical presence and interaction with the state of dispersion. This work aimed to study the effects of hydroxyapatite (HA) nanoparticles on the behavior of devitrification and recrystallization of glycerol (60% w/w) and PEG-600 (50% w/w) solutions during warming. HA nanoparticles of different sizes (20nm40nm60nm) and contents (0.1%0.5%,w/w) were incorporated into solutions, and were observed under a cryomicroscope. Experimental results showed that the morphologies of glycerol and PEG-600 solutions are dendritic and spheric respectively. The ice fraction of glycerol solution containing 0.1% HA with the size of 60nm decreased to 2/5 of that of solution without nanoparticles. The ice fractions of PEG-600 solutions with and without nanoparticles increased significantly between-64 °C and-54 °C, and the ice fraction of PEG-600 solution without nanoparticles increased by 92% within the temperature range. The findings have significant implications for biomaterial cryopreservation, food manufacturing, and cryosurgery.

Fibre-optic temperature sensor with wide temperature range characteristics

1987 ◽  
Vol 134 (5) ◽  
pp. 291 ◽  
Author(s):  
K.T.V. Grattan ◽  
J.D. Manwell ◽  
S.M.L. Sim ◽  
C.A. Willson
Keyword(s):  
Wide Temperature Range ◽  
Temperature Sensor ◽  
Fibre Optic ◽  
Temperature Range
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