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The effects of TiN addition to Si3N4 on its mechanical and wear properties were investigated.
Introduction Silicon nitride is a very attractive ceramic material because of its excellent mechanical properties at both ambient and elevated temperatures.
One approach to improving the mechanical properties of brittle materials in general is through composite strengthening techniques, such as fiber, whisker or particulate-reinforced ceramics [2-5].
This work investigated the mechanical properties of silicon nitride based composite with secondary phase TiN addition, and examines the influence of friction coefficient for different load under reciprocated sliding wear test.
Tribological factors include the friction coefficient and the wear coefficient (W), W＝V/LD (mm3N -1m-1) with V (mm3) the wear volume, L (N) the normal force and D (mm) the sliding distance [19].

The development of the resin modulus is derived using the dynamic mechanical analysis (DMA) tests and the effective mechanical properties of the processing composite are calculated using a micromechanical model.
Lumped material properties are used and assumed to be constant.
On the other hand, the effective mechanical properties of the quasi-isotropic (QI) CFM layer is calculated considering the material properties of the UD layer obtained by the SCFM approach for the same Vf as the QI layer [16].
Local material orientations are employed for the UD and CFM layers separately in order to reflect the mechanical properties correctly.
On the properties of quasi-isotropic laminates.

It can be seen that the target voidage of pervious concrete is one of the key factors affecting the noise reduction performance of pervious concrete [4].
However, there are few reports on the effects of these two factors on the sound absorption and noise reduction performance of pervious concrete.
The specific properties are shown in Table 1.
Table 1 Physical and mechanical properties of cement Specific surface area（m2/kg） Apparent density（kg/m3） Setting time (min） Compressive strength（MPa) Initial setting Final setting 3d 28d 317 3060 139 269 20.7 50.8 Aggregate: Aggregate is divided into two grades: 1# 4.75-9.5 mm, 2# 2.36-4.75 mm.
Study on the preparation and properties of cement-based sound absorption and noise reduction composites [D].

Several studies have been conducted to determine the mechanical properties and strength of foam concrete.
From the experiment, results showed that S/W ratio affected fracture energy.
Renewed interest in the application of foam concrete as a structural element has led to various studies on the engineering properties, strength, and structural behavior of this material.
This finding significantly affects the fracture energy of foam concrete.
Kunhanndan Nambiar, G Indu Siva Ranjani, A classification of studies on properties of foam concrete, J.

Therefore, research is going on to develop a composite material which satisfies the basic requirement of tool properties.
EDM tool electrode can also be produced with desirable properties by the result of a combination of different materials.
Generally, a higher duty factor means increased machining efficiency.
The selection of tool electrode material is so important by mean to obtain high expectation of desirable properties of tool electrode.
[6] J.Marafona, Black layer affects the thermal conductivity of the surface of copper tungsten Electrode, Int J Adv Manuf Technol. 42 (2009) 482-488

One of the main factors affecting porosity and mechanical properties of copper detonation coatings with aluminum base is the initial velocity of sprayed powder particles.
One of the most important controlled technological factors influencing detonation coating formation process of powdered materials is the fill factor of detonation unit chamber by gas mixture, which is a ratio of a detonating mixture to the total volume of the trunk and the mixing chamber.
Conclusion As a result, an experimental investigation into the influence of factors on the rate of detonation of throwing powder particles on the basis of copper and porosity of the working surface of combined contact CDD has been conducted.
[3] Nenashev, MV Technology and properties of nano-structured coatings detonation in [Text] / M.
Emerging technologies, properties and applications of electrochemical nanostructure coatings [Text] / S.Y.

In particular, the powder bed based laser beam melting (LBM) allows a precise spatial energy input to fully melt metal powders to dense structures with mechanical properties comparable to those of conventionally manufactured parts.
To determine the viscoelastic properties an oscillation test, namely the amplitude sweep, was performed.
The larger the difference between the moduli is the more the samples show the properties of a pure fluid and solid, respectively.
UV-vis-NIR Spectroscopy The UV-vis-NIR spectrophotometry was used to characterize the absorption properties of the obtained samples.
DOE of Printing The computational design of experiment was used to acquiring data in a controlled way, obtaining information about the printing processes and also to identify significant factors affecting the process.

These ionic substitutions could disturb morphology and crystallinity structures which in return affect the properties of the calcium phosphate ceramics.
Various studies have been done to improve the properties of CaP [6].
Zinc ions play significant role as bone growth factor in in vitro and in vivo [6, 7].
These peaks depend on several factors such crystallite size and crystallinity [2].
Our work demonstrate that the desired properties for future biomedical application can be obtained by substituting ions such as zinc through precipitation method.

It demands for high strength, good toughness, uniform mechanical properties, the least residual stress and excellent resistance to stress corrosion due to bearing wicked working environment.
So the traditional free forging process has become a factor that baffles the development of retaining ring manufacture and must be reformed [2].
The punch is one of the main dies, whose working angle (as shown in Fig. 8) not only affects the value of the forming loading, but the strain distribution of the ring blank.
Chinese journal of mechanical engineering.
Chinese journal of mechanical engineering.

The compatibility between matrix and filler is an important factor to decide the mechanical properties of composites.
Results and Discussions Compressive Properties.
This shows that PS content is low, a larger mechanical strength of composite resulted from a chemical cross-linking that phenol and formaldehyde were copolymerized with lignin from the peanut shells in H2SO4 catalyst to produce biocomposites as mentioned above.
This shows that adhesion between PF and PS is an important parameter affecting the mechanical properties of composites.
PS(WT%) non-proportional compression strain forces(Fpc0.2) (N) maximum stress(Fbc) (N) Compressive modulus(Ec) (MPa) note (catalyst) 1 0 8285.29 19964.72 352 NaOH 2 0 8664.56 14068.14 561 H2SO4 3 8.91 3126.oo 4317.14 484 H2SO4 4 4.46 6183.65 14136.30 357 H2SO4 5 8.27 4656.40 10217.42 272 H2SO4 6 16.55 2015.09 2973.90 308 H2SO4 Scanning Electron Microscopy(SEM).Figure 3 shows that adhesion between PF matrix and PS is loose(as left), chemical reaction between PF and lignin,a polyphenolic compound located on fiber surface resulted in close adhesion between PF matrix and PS(as right).some of the organic functional groups in PS are reactive and are the main factor to decide the compatibility with PF matrix .