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Main factors affecting dielectric properties of alumina ceramics are density (that is to say, porosity), impurities, grain size and so on.
Additions always used for lowering sintering temperature and restraining grain growth to improve mechanical properties during sintering, such as MgO, TiO2, La2O3 and Y2O3[1-3].
Dielectric properties of Al2O3 ceramics.
However, excess Y2O3 have adverse effects on dielectric properties.
Alumina ceramics via HP showed better dielectric properties.

Aging further increased the mechanical properties of the estruded alloy.
The low cost of this alloy, but casting under a coarse microstructure, composition fluctuation, seriously affect its mechanical properties.
Mechanical Properties.
Mechanical properties before and after the alloy extrusion are showed at Fig. 4.
So the comprehensive mechanical properties of the material were improved greatly.

However, good weldability is the main factor in ensuring the safety of welded structures.
Some studies have shown that the microhardness mapping in several materials was efficient to obtain the mechanical properties.
Zhu et al. (2007) [8] using a nano-hardness mapping obtained the mechanical properties of the phases present in stone and cement.
The obtained images showed with more clarity the regions with smaller mechanical properties.
The objective of this study was to obtain information on the mechanical properties of a welded joint of aluminum 5052, using a Víckers microhardness mapping technique.

The implementation of crumb rubber has various effects on the properties of concrete depending on several factors such as the amount of aggregate substituted and the size of the crumb rubber.
The implementation of crumb rubber has various effects on the properties of concrete depending on several factors such as the amount of aggregate substituted and the size of the crumb rubber.
Azmi, Strength reduction factors for structural rubbercrete, Frontiers of Structural and Civil Engineering 8(3) (2014) 270-281
Sharma, Mechanical and durability properties of waste rubber fiber concrete with and without silica fume, J.
Wu, Effects of rubber particles on mechanical properties of lightweight aggregate concrete, Constr.

Table 1 Factors and Its Values of Preparing Cf /Al Composites by Liquid-solid Infiltration Extrusion Factors Melting Temperature [℃] Extrusion Temperature [℃] Extrusion Pressure [MPa] 680 650 30 690 660 40 700 670 50 2.3.
The mechanical properties of composites are improved compared with that of the matrix alloy.
At the same time, it will cause the large grain of the alloy and seriously affect the mechanical properties of the composites.
"Mechanical Properties Analysis and Application of Metal Matrix Composites."
"Effect of Nd content on microstructure and mechanical properties of Gr f /Al composite."

This will make the microstructure of HAZ become complex and the mechanical properties are very much fluctuant [[] S.
Therefore, it is necessary to understand the change of the structure of bainite steel in the welding heat cycle and its influencing factors.
The properties of weld metal and base metal may be evaluated through conventional mechanical test by slicing a specimen from the region of interest.
WANG, J.B.QU, Microstructure and Mechanical Properties of the Simulated Welding Heat Affected Zone of an E550 Shipbuilding Steel, Journal of Iron and Steel Research.25 (2013) 35-41
This steel has the following mechanical properties: Rel=624 MPa, Rm=717 MPa, δ=21%, AKV (-40 ˚C) ≥165 J.

Performance Analysis of Reinforced Concrete Structures Strengthened with BFRP Zebao Kana , Yanru Lib College of Service, Navel University of Engineering, Tianjin,China akanzebao@163.com, byanru_li@126.com Keywords: BFRP, Strengthen, Reinforced Concrete Structures, Calculation Model, Mechanical Properties Abstract.
Based on those researches, the mechanical properties and calculation models are analyzed.
Introduction With the increase of service life of concrete structure, because of the changes of environment and other factors, many problems of the structures which have been built are appeared, such as aging, damage and the performance of lagging behind.
There are many factors affecting the reinforcement effect, which can be divided into two categories.
At present, the domestic and foreign scholars did lots of experimental researches on the mechanical properties of strength, stiffness and ductility of concrete columns confined by FRP under the simulated seismic loading.

Introduction One of the main problems also severe environmental factors affecting soil properties in the last decades is the acceleration and spread of soil salinity in arid and semi-arid regions around the world [1].
At Sebkha, in fact, the level of the salt water table varies seasonally from 1m under the surface (in the case of heavy rainfall) to 4 meters in depth [3, 4] during the dried season affecting the mechanical properties of the ground soils and raising the question of the stability of the runway.
Not only the similarity between the hydro mechanical properties of these two soils, but also their statistical representativeness of the in situ reality is studied.
In situ, the mechanical properties of two soils are characterized by several SPT and pressuremeter tests whereas the in situ hydraulic properties are heavily known in the scale of the site.
Some physical and index properties of the reconstituted soil in laboratory.

Mechanical Properties of AlCrTiSiN Coatings Developed by Cathodic Arc for Protection Applications Nurot Panich1,a,*, Surasak Surinphong2,b, D.A.
The mechanical properties of the resultant coatings were summarized in Table 1.
This is to extract the intrinsic mechanical properties of the tested samples by calculating the coating properties from the unloading curve [3].
In addition, mechanical properties of the substrate mostly affect the failure mechanism and the critical load thus making it impossible to compare the same coating which has been deposited on different substrates.
Two factors then contribute to the stress ahead of the indenter.

Both steels exhibited a good combination of mechanical properties (Table 2).
Mechanical Properties of steels.
The study of mechanical properties showed an increase in the UTS of ~150 MPa and YS of ~ 300 MPA.
One of the major factors responsible for the retained austenite stability is the higher carbon content.
Conclusions Both IA and TMP steels after PS/BH treatment demonstrated an improvement in mechanical properties.