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Materials obtained by using of two spacers, have been analyzed in order to value different results in porosity, microstructural and mechanical properties.
One of the most common is in the field of biomedicine, which is well-known to be a biocompatible material with good corrosion properties and appropriate mechanical properties [1].
Mechanical properties and elastic modulus of porous materials has been characterized.
The mechanical properties depend on porosity, decreasing when porosity increases [13].
Ashby: Cellular Solids: Structure and Properties.

Surface Morphology is now recognized as one of the key factor in advanced machining technology for functional behaviour of a part [1].
Wojciechowski et al. [4] presented analysis of various factors affecting machined surface texture.
The workpiece material is austenitic stainless steel because this stainless steel is widely used for many industrial applications due to its unique properties and cost.
The austenitic stainless steels is a combination of good mechanical properties and superior qualities regarding resistance to corrosion combined with very good spring properties and high fatigue strength.
The main purpose of this study was to determine the effect of cutting speed as a key process factor in controlling surface quality.

Additionally, CFT columns possess high fire resistance properties [1].
Experimentally obtained Material properties.
Mechanical properties of the concrete were then obtained through Uniaxial compressive tests.
Table 3 Details the experimental properties obtained from the tests.
[18] Chinese Standard, GB/T 50081-2002, Standard for test method of mechanical properties on ordinary concrete, 2002

The main factors, influencing the low density light foam concrete, include the selection and dosage of cementitous material and admixture, the volume of foam, water consumption and chemical admixture for concrete.
Because of the high temperature resistant properties of Inorganic heat preservation materials, foam concrete can quickly fascinate the material engineer.
Now, mass of foam concrete research work is focused on the density of 300-1200 kg/m3 , these are limited to the properties of the foam concrete, such as fresh state properties, physical properties, mechanical properties, durability properties [3-9].
Water consumption can determine the workability of the fresh foam concrete and affect the hydration of the binder.
However, with the density decreases, the mechanical strength deceases rapidly.

Sintered carbides with cobalt, as metal binder, with good properties of abrasion resistant in high temperature environment are used as construction material.
The mechanical properties depend on amount of WC in the material structure, grain size of WC and the amount of metal binder in the material structure [5-6].
Projects, which performance depends on many factors should apply a statistical technique in experiments, introduced in the 1920s by Ronald A.
F-test value at 95% confidence level is used to decide the significant factors affecting the process and percentage contribution is calculated.
The properties of work piece material (WC) are as follow: • density 13 g/cm3, • hardness HV10 equals 950, • hardness HRA equals 85.4.

The aim is on the one hand to build structures more tolerant to damage, and on the other hand, to reduce the effect of this type of solicitation due to the severe degradation of the mechanical properties of these materials under impact damage [4], [5].
The authors showed that the impact energy level and the number of impacts are the main factors of damage.
A variety of research works are made on glass polyester composite material [9-11] which are used in various engineering industries because of their superior performance and tailor made properties.
Selzer et al. [15] investigated the mechanical properties and failure behavior of carbon fiber-reinforced polymer composites under the influence of moisture introduced into the specimens by immersion in distilled water.
Friedrich, Mechanical properties and failure behavior of carbon fiber-reinforced polymer composite under the influence of moisture, Composite 28A (1997), 595-604

One important factor in the property formation of a wear-resistant coating is the condensation temperature.
The influence of the content of a second element (Мо) and acetylene (С2Н2) on the mechanical properties of coatings TiZrN (a) and TiZrCN (b) Formation properties of the coatings by changing their composition.
Multi-element coatings with the same system (for instance, Ti-Zr-N), produced with different plant layout, differ in composition, parameters and physical/mechanical properties (Fig. 1а) and therefore affect the efficiency of cutting tools differently [4,7].
The influence of Al content on the mechanical properties of TiZrAlN coatings The physical/mechanical properties of multi-element coatings depend on the design of evaporating cathodes, used in their application.
The mechanical properties of a coating can be altered by means of additional hardening treatment.

Tunnel's tunneling already becomes the primary factor of the efficiency about the mine coal produce.
Shenyang North Heavy Industry Group, conducts a study about it and develops with independent intellectual property rights of the boring machine in China.
The impaction of the depth, energy, speed, diameter and other parameters are also affecting the distribution of rock stress.
The hole depth of penetration also affect the amount of disk cutter, it is shown in Fig.1.
The design of the cutting head is consideration of the changes in rock stress, it is shown in Fig.2 .The main factors affecting the rock stress are impact depth, energy, speed, diameter and other parameters. it is shown in Fig.3.

The selection of stainless steels may be based on corrosion resistance, fabrication characteristics, availability, mechanical properties in specific temperature ranges and product cost.
However, corrosion resistance and mechanical properties are usually the most important factors in selecting a grade for a given application.
Therefore, the technology of bimetallic castings is gaining in importance, particularly when the criterion for highly usable properties concerns only the working surface layer and the rest of the casting is only the base part which is not exposed to the direct influence of factors causing abrasive or corrosion wear.
[2] ASM Metals Handbook, Properties and Selection - Irons, Steels and High-Performance Alloys, Volume 1 of the 10th Edition Metals Handbook. (1993), ASM International Handbook
Lu, Effect of volume ratio of liquid to solid on the interfacial microstructure and mechanical properties of high chromium cast iron and medium carbon steel bimetal, Journal of Alloys and Compounds, 509 (2011) 6700–6704

Introduction Fiber-reinforced ceramic matrix composites have been widely applied in many fields of modern industry, defense and aerospace due to their good physical and mechanical properties.
Most of the studies are focused on the preparation process of the composite materials, mechanical properties and failure mechanism.
The different of fibers structure on each surface cause different mechanical properties in directions. 2.2 Grinding experimental apparatus MK9025 CNC optical profile grinding machine is used in the experiment.
The physical and mechanical properties of the matrix and fibers are quite different.
Grinding surface damage is mainly the fracture of fibers, with a large number of the matrix broken. 3.2 The effects of grinding parameters on Grinding force In the process of fiber-reinforced ceramic matrix composites grinding, grinding parameters is one of the main factors which affect the grinding process.