Search results

In addition to being fire and chemical resistant, geopolymer possesses excellent mechanical properties.
It also possesses excellent mechanical properties, and fire and chemical resistance.
The compressive strength of geopolymers depends on a number of factors such as curing temperature/time, alkali concentration/type/pH, and silicate and aluminum ratio.
Influence of pH The most significant factor controlling compressive strength is pH.
The compressive strength of prepared geopolymer was affected by types of activator and pH.

Therefore, we conducted an orthogonal test of 4 factors and 3 levels to study the effect of some parameters on the porosity of the preform.
Four factors and their corresponding levels in the study Factor Sintering temperature ℃ A Sintering time(h) B NaCl Size(mm) C Cold-compacting pressure(MPa) D Level 1 540 1.5 1.18-1.7 5.0 Level 2 570 2.0 1.7-2.36 7.5 Level 3 600 2.5 2.36-3.35 10.0 Table 3.
The irregularity and nonuniformity affect the mechanical and electrical properties of the samples.
Among the 4 parameters, the porogen size affects the porosity most.
Mortensen, Influence of the infiltration pressure on the structure and properties of replicated aluminium foams, Mat.

Introduction Free-cutting steels are known for their machinability because of free-machining additives ,such as S、P、Pb、Se、Te、Bi、Zr、Re, which can affect machinability and mechanical properties.
Preparing heat treatment is important because appropriate heat treatment could make good the material structure, reduce or even eliminate internal stress, improve mechanical properties and so as to prolong the life of machine parts produced.
Moreover, by heat treatment, machine parts can gain the ability of abrasive resistant and corrosion resistant properties.
Surface roughness is of great importance because it is used as the critical quality indicator for the machined surfaces and has influence on several properties such as wear resistance, fatigue strength, coefficient of friction, lubrication, wear rate and corrosion resistance of the machined parts [5].
Consequently, surface roughness becomes one of the most important factors assessing the machining quality especially for finish cutting.

The results showed that the nanoparticle was exactly ZnO with wurtzite type crystalline structure and the size of nanoparticles is strongly affected by the ratio of water to surfactant(R).
Nano-sized materials exhibit novel and significant mechanical, electronic, magnetic and optical properties in comparison with their bulk counterparts [1-4].
However this method was affected by many factors, such as precipitation agent, pH, temperature and solution concentration, hence the process is difficult to be control.
The TEM showed that the size of nanoparticles was strongly affected by the ratio of water to surfactant(R) value.

Properties of High Pressure Water Hydraulic Components with Modern Coatings Janusz Pobędzaa, Andrzej Sobczykb Institute of Machine Design, Cracow University of Technology, al.
Cylinder friction force is varied and depends on few factors like: cylinder velocity, pressure and temperature.
The first stage of research was dedicated to determine properties of singular cartridge valve 2-URES-6 installed in two way body.
The use of water reduces pressure losses by half, positively affecting energy efficiency of the high pressure water hydraulic system.
Covering the inside surface of the cylinder and the piston and piston rod surface confirms the protective properties of novel coatings against corrosion of steel parts, together with acceptable values of hydro-mechanical efficiency, not different from characteristics of oil actuators.

The thermal-induced stress leads to the deformation of the parts; the flow-induced stress alludes anisotropy and optical property, affecting the surface molding state of a part [3].
The conventional studies on residual stresses are limited to the thermal stress, a dominant factor of residual stress, and to the deformation of the part.
Governing Equations and Material Properties Polymeric flows in the filling phase can be approximated to a flow between two plates separated by a small gap.
Materials for the thin wall applications require good flow properties; thus, ABS, which is made from 3 monomers of Acrylonitrile, Butadiene, and Styrene, was used as an amorphous polymer and PP (Polypropylene) as a crystalline polymer.
The properties of two polymers are arranged in Table 1.

Nano/microtexture along with the low surface energy are the controlling factors for the wetting properties of a surface.
However, this should be considered only as an indicative result due to the fact that during thermal spray deposition the surface chemistry and properties of the feed powders are affected.
Understanding the mechanisms of condensation and the factors that affect it can lead to the development of more efficient surfaces, where the condensation mode will be dropwise.
However thermal spraying conditions may vary, affecting either deposition efficiency or coatings texture as mentioned previously [13-17].
Stathopoulos, Influence of organic phase change materials on the physical and mechanical properties of HDPE and PP polymers, RSC Advances 8 (2018) 27438-27447

This shows the performance of CFRP pressure vessel is related not only with fiber strength but also with material properties of resin matrix, tension and solidifying system of winding process.
Basis for normal distribution properties it is little that deviation treble standard deviation, which is about 3% and can be neglected in engineering.
This shows the performance of composite is not only related with fiber strength but also with matrix formulation and fabrication technology. 4.1 Material properties of resin matrix have an important effect on composite properties, specimens in this test have been manufactured by continuous carbon fiber–-amine system, a new flexible formula.
A part of winding tension even equal to zero and this seriously affect the performance of carbon fiber materials.
Research direction: Mechanical Properties of Pressure Vessel and Solid Rocket Motor Case.

Many forming factors have been found concerning the quality of the forming part.
Many forming factors have been found concerning the quality of the forming part.
However, the slurry filling sequence, which could be a very important affecting factor, has never been reported.
It is conceivable that the properties (mechanical property, microstructure, segregation, etc) in different areas of the part are not the same because of the structural complexity of the standard part.
In FEM simulation the effects of air pressure from the die cavities on the material filling are neglected, this factor has however more or less influences on the metal flow behavior in practical experiment.

The most commonly infrastructure material used, nowadays, in all-ceramic dental prosthesis, consists of polycrystalline tetragonal zirconia partially stabilized with yttria (Y-TZP) (5,6), because the combination of their mechanical properties such as high fracture toughness and flexural strength property associated with phase transformation property (tetragonal to monoclinic), and lower modulus of elasticity (7,8).
All of these properties together justify the higher survival rate of infrastructure when compared to the other dental ceramics (9,10).
For this study, the choice of Y-TZP to make the  infrastructures, among oxide ceramics, is justified by the fact of having excellent mechanical properties such as high fracture toughness, high flexural strength, associated to the property of phase transformation (tetragonal to monoclinic), and lower modulus of elasticity (7,8) and the cause of machining blocks pre-sintered, (12) happens, since the blocks produced for the systems CAD-CAM are more homogeneous and with minimal inherent defects compared to manual procedures in layers (13).
Indeed, it is necessary to analyze each of these factors that can lead to chipping, to an understanding of its relation with the problem.
Especially regarding to wear antagonist substrate of the optical properties with respect to surface roughness and in relation to aging and the possibility of phase change of the transmitted directly front on them (29) tensions.