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Quantum mechanical calculations of the electronic structure of hydrogen storage materials have undoubtly deepened our fundamental understanding of their basic properties.
In this paper, we focuss on the latter aspects, we discuss the electronic and elastic properties of Haucke compounds of AB5 type (A=La or Y, B=Ni), in relation with their hydrogen absorption properties.
Substitutions at the La and Ni sites have been extensively used to modify the thermodynamic properties of LaNi5 and play a crucial role in the selection of the alloy for specific technological applications [12-15], since they affect the stability and the hydrogen content of the hydride.
These elastic and electronic effects affect in turn the hydrogen absorption properties relevant to applications.
Elastic properties.

The performed experimental parameter study confirms the expected influencing factors and is used to determine parameters of a bonding model, which can be integrated in a finite element simulation.
By permanently joining suitable metals, this process allows a combination of the individual advantages of the used metals and results in a composite with specific optical, mechanical, chemical, thermal and electro-magnetic properties.
In summary, the known influence factors on the bond strength are surface enlargement, normal pressure, temperature, strain rate, shear strain and the surface condition.
This test procedure should allow an individual variation of the influencing factors and a characterization of the bond strength.
The results confirm the expected effect of the influencing factors on the bond strength and are used to determine parameters of a bonding model, which was integrated in a user-subroutine.

Moreover, the use of SCMs will adjust the hydration and mechanical properties of cement[4,5].
In the early hydration, the calcined clay and limestone adjust the performance of cement by affecting the hydration of cement itself.
These additional hydration products is another reason for the mechanical properties improvement.
Additional hydration products improved the mechanical properties of blends and refined the pore structure
Favier, Impacting factors and properties of limestone calcined clay cements (LC3), Green Materials, 7(2019)3-14

Introduction Sapphire has great mechanical, optical and chemical properties , such as: high transmission rate , good thermal conductivity , wear resistance, corrosion resistance , hardness and other characteristics, therefore sapphire is the most commonly used material in the LED industry.
Table 2 Experimental factors Experimental factors Levels Aperture of nozzle (mm) 4 Blasting time (min) 2 Platform revolution velocity (rpm) 100~300 Nozzle-to-workpiece height (mm) 30~70 Impact angle (。)
Therefore, factors that affect the results of these parameters can be ignored.
It can be seen from the data in the table, the results display excellent reproducibility, so the interaction between experimental parameters affecting factors can be ignored and the demonstrates the effect of the sapphire substrate surface roughening.
Reflection properties of: (a) before AJP and (b) after AJP using #800 Zirconium abrasives.

The use of dimension stones in architecture and civil engineering implies the knowledge of several mechanical, physical, and chemical properties.
Even though it has been usual practice to measure physical and mechanical properties of dimension stones the same is not true for thermal properties such as thermal conductivity, thermal diffusivity, specific heat capacity, and heat production.
These properties are particularly important when processes related with heating and cooling of buildings must be considered.
Since the same set of rocks has also been studied for other physical properties, a correlation amongst all the measured properties is attempted.
Usually the value of a rock is related with its visual aspect and texture; however, many other properties have to be studied to understand rock quality and commercial value; in that respect the behaviour and response to physical, chemical, and mechanical factors is of the greatest importance.

Preparation and properties of porous poly (vinyl alcohol)/powdered activated carbon composite Haiping Wang Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, P.
In addition, the key factors of influence on water-absorbency including the amount of activated carbon and formaldehyde as well as the concentration of sulphuric acid have been discussed.
Poly (vinyl alcohol), a non-toxic water-soluble synthetic polymer, has a wide commercial application due to its good physical and chemical properties.
Therefore, it is necessary to convert PVA into a completely insoluble material with high mechanical properties.
The mechanical agitator was then removed.

This kind of alloys possesses excellent mechanical properties, such as high strength, high hardness, improved wear resistance, and increased corrosion resistance [8].
Their bio-properties are analyzed in comparison to that of the Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 BMG and Ti alloy.
The material surface has been acknowledged as one of the most significant factors for successful outcome in bone tissue healing [13, 14].
The result shows that the properties of BMG and BMGMC can hardly influence cell attachment.
Bauer, Mg-based bulk metallic glass composite with high bio-corrosion resistance and excellent mechanical properties, Intermetallics. 29(2012) 56-60

The SLM final parts are characterized by high mechanical properties and satisfactory physicochemical properties.
However, master the SLM process, correct optimization and thus account for the appearance of the defects is essential to know all factors, which have been an influence on the final properties of the manufactured details.
The one of the most important factors are process parameters (there are over 40 different SLM/SLS process parameters), which can be classified into six categories (Table 1): material and initial powder properties (1), powder bed properties (2), laser parameters (3), scan strategy (4), build environmental (5), sintered layer properties (6), out of which it is possible to defined as controlled parameters (parameters, which can be easily modifiable during process) can be distinguished [21-26].
Four groups of post-process defect can be distinguished: anisotropy and porosity (1), hot cracking defects affecting geometric deformations and dimensional inaccuracy, surface quality (3) and insufficient mechanical properties (4): Figure 2.
However, other important factors such as absorption, heat transfer or solid/liquid interface have a significant effect on the physical behavior of properties of laser beam-powder material system and leading to the non-linear response of all system.

Configuration and Adjustment of Substrate Preheating Device Kai Zhang1,a, Risheng Long2,b and Weijun Liu3,c 1School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China 2Research Department, SANY Heavy Industry Co.
There are many factors affecting the quality, precision, microstructure and performance of LMDS-deposited parts.
These short duration thermal cycles can induce solid-state transformations in the previously deposited layers, and lead to progressive modification of their microstructure and properties.
As a result, the type and extent of the solid-state phase transformations induced by the thermal field in the part may vary from point to point, thus leading to the complex distribution of microstructure and properties observed experimentally [5].
Among the influencing factors of thermal history, substrate preheating is an effective one to resolve the above-mentioned issues.

These mortars, due to their esthetical properties, can satisfy not only traditional properties but also decorative aspects for fair-faced masonry finishes.
The increase in solar reflectivity is one of the most important factors that help in reducing the heat flow into buildings [13].
Factors affecting solid waste recycling in Egypt.
Enhanced physical, mechanical and microstructural properties of lightweight vermiculite cement composites modified with nano metakaolin.
Thermo-physical, mechanical and microstructural properties of cementless lightweight mortar.