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Hydroxyapatite (HA) is also known for its electret properties [1], piezoelectricity [2-4] and pyroelectricity [3, 5].
While electret properties mean that space charge can be introduced and/or dipoles can be aligned by means of an external electric field [4], piezo and pyroelectric properties indicate that hydroxyapatite is naturally polar, confirming a prediction made from quantum mechanical simulation [6].
Disadvantages are the usually high degree of specialization and the simultaneous existence of several variables affecting the microwave measurement (temperature, density, moisture, structure, etc.) in material measurements [9].
To investigate the properties of HA in a form of coating, namely as a film, the following procedure was employed.
These spectra will be further analysed to determine the dielectric constant of HA at GHz frequencies and how different forms affect these properties.

The different factors that affect the Young's modulus such as the phase's stability, role of alloying elements, plastic deformation, and texturing are discussed.
Among the other mechanical properties, the low Young’s modulus alloys has been given a special attention recently in order to avoid the occurrence of stress shielding after implantation [2].
Young’s modulus change with phases stability It is well known that the Young’s modulus as well as some other mechanical properties change according to the type of the phases existing in the alloy [5].
(1) Some other elastic properties such as Poisson's ratio, anisotropy value, etc., can also be derived.
Texturing in the phases by sever plastic deformation of b-Ti alloys results in anisotropy of its properties including the elastic properties.

Molecular Dynamics Study of Mass Transport Properties of Liquid Cu-Ag Alloys U.
Introduction Copper and copper alloys have attracted much attention for their commercial demand and are often used at temperatures where diffusion processes affect their properties.
Diffusion can incur significant changes in mechanical and electrical properties through compositional changes at interfaces, surface alloying, interface degradation and so on.
This potential not only accurately reproduces various properties of crystalline Ag but also gives a realistic description of the principal properties of liquid Ag, even though no liquid data were included in the fitting of the potential.
Although properties used in the fit refer to 0 K temperature (except for thermal expansion factors of pure Cu and Ag) and do not include liquid configurations, the potentials demonstrate good transferability to high-temperature properties.

Properties of a Composite Cement Binder Using Fuel Ashes V.V.
We used different types of fuel ashes as active mineral additives with the following physical-mechanical and chemical properties (Table 1).
Analysis of the strength data shows that each additive affects the strength of the binder to a different extent, depending on its properties.
We can recommend these materials as additives only in the case when it is acceptable to use a binder with low physical and mechanical properties.
Nagar Impact on fresh, mechanical, and microstructural properties of high strength self-compacting concrete by marble cutting slurry waste, fly ash, and silica fume Construction and Building Materials 239 (2020) 117888 [11] R.

These materials exhibit a unique set of microstructures and mechanical properties not found either in monolithic ceramics or metals.
The mechanical properties of MMPCs depends on the microstructure and properties of matrix materials, nature of the particles, the distribution, size and shape of particles and the interfacial behaviour between particles and matrix.
Pagounis et al. [5] produced steel matrix composites using hot Isostatic pressing (HIP) and studied the factors influencing the reinforcement distribution, interface processes, as well as mechanical and corrosion properties.
Different microstructural parameters such as hardness, volume fraction, size, shape and distribution of the embedded particles, the properties of the matrix and the interfacial bonding between two phases, also affect the mechanical properties of these ceramic particles reinforced composites.
The good binding interface between the matrix and reinforcement results in better mechanical properties of the composites.

Mechanical Engineering and Industrial Design.
Introduction CFRC (Carbon Fiber Reinforced Composites) show excellent relationship weight/physico-mechanical properties, much higher than those in metallic materials.
The interface between the fibers of material offers low resistance to avoid time crack propagation, depending only on the properties of the matrix, much less resistant than fiber.
In order to dispose of an evaluation methodology of these defects a new factor DF based on the calculation of the percentage change of the affected area versus nominal area has been proposed.
It can be associated with the duration of the thermo mechanical effect on the workpiece.

Introduction Many areas of mechanical engineering are characterized by a permanent development of components and modules with the aim of reducing weight, increasing reliability, under the consideration of physical properties such as corrosion resistance or thermal conductivity.
The local fatigue strength in the component is influenced by rolling reduction, stress concentrations, forming process, residual stress and by other factors.
Therefore mechanical behaviour of the material can be considered independent from the manufacturing process and there is no influence of the rolling reduction on the mechanical properties of AA6016 (see Fig.2).
The influence of the rolling process on the mechanical properties is significant.
Karimi Taheri: the effect of annealing treatment on mechanical properties of aluminium clad steel sheet, Materials & Design 24, 617-622, 2003

Introduction Advanced ceramics are currently used in many industrial sectors due to properties such as high hardness, good abrasion and corrosion resistance, and retention of high strength at high temperature.
Other significant factors affecting pressed green density include applied pressure, friction between granules and the die wall, granule flow-ability [1, 2], and particle size distribution (PSD) [3].
Factors affecting sintering shrinkage include the sintering profile, heating rate, green density, and material characteristics [4, 5].
The current work studied the effect of properties of 92% alumina spray dried granules on the compaction, and the amount of shrinkage during sintering of simple and complex shaped samples.
McCuiston, The effect of granule morphology and composition on the compaction behavior and mechanical properties of 92% alumina spray dried granules, J.

Delamination or interlaminar fracture often occurs in composite laminate due to several factors such as high interlaminar stress, stress concentration, impact stress as well as imperfections in manufacturing processes.
This kind of failure can affect performance of composite materials in their services [3].
Table 1 and 2 describe the laminate mechanical properties and cohesive zone parameters, respectively [10, 11].
Mechanical properties of CFRP HTA/6376C Mechanical Properties Values E11 120000 MPa E22 10500 MPa E33 10500 MPa ν12 0.3 ν13 0.3 ν23 0.51 G12 5250 MPa G13 5250 MPa G23 3480 MPa Table 2.
Parameters of CZM Mechanical Properties Values GIc 0.260 kJ/m2 σmax 30 MPa K 106 N/mm3 In this simulation, element type of SOLID185 is used to model the 3D solid, while INTER205 elements are employed as the interface elements.

In the second half of this paper the comparison of the productivity differences between TIG and ATIG welding; mechanical properties, microstructure and corrosion resistance of welded joints will continue.
• What are the mechanical properties of the joints of TIG and ATIG welding?
The first aim was to clarify the effects of the outer determinant factors.
Comparison of mechanical properties Several tensile and bend tests were made on welded joints of both TIG and ATIG welding, but any difference were found between the results.
This result represents that ATIG welding's mechanical properties are just perfects like TIG welding's.