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Magnesium-Silicon Substituted Carbonate Hydroxyapatite (Mg-Si CHA): Factors Affecting Sintering Ahmad Fauzi Mohd Noora and Harmiza Zainudinb School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Penang, Malaysia asrafauzi@usm.my, bharmiza_zainudin@yahoo.com Key words: Carbonate hydroxyapatite, Sintering, Microstructure Abstract.
Sintering of Mg-Si CHA in particular is a complex process since changes could occur during sintering, which include phase formation, grain size, pore size and carbonate content, and this in turn affects the mechanical properties.
Improved mechanical properties of Mg-Si CHA is critical in load bearing implant applications.
Poor control of thermal treatment of Mg-Si CHA during sintering would cause carbonate loss, leading to partial or total decomposition of Mg-Si CHA, subsequently would affect the physical and mechanical properties.
To achieve this, the synthesized CHA was sintered with the aim to densify and improve the mechanical properties and other functional properties of the final product.

Factors Affecting Contact Pressure Distribution on Bolted Joint Interface Jingping Liaoa, Dingwen Yub and Pingfa Fengc Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control, Tsinghua University, China 100084 aliaojp13@mails.tsinghua.edu.cn, byudw@tsinghua.edu.cn, cfengpf@mail.tsinghua.edu.cn Keywords: Bolted joint, Parametric model, Interface pressure distribution, Influencing factors Abstract.
To investigate factors affecting contact interface pressure distribution in bolted joint, a parametric model was established by ANSYS APDL language in this paper.
Besides, the contact pressure distribution directly affects the static and dynamic properties of joint interface [1,2].
Factors affecting interface pressure distribution in bolted joint Based on the established finite element model, factors affecting the contact pressure distribution on bolted joint interface will be discussed, including the bolt load, bolt diameter, member thickness and washer.
Conclusions A numerical method had been used to investigate factors affecting contact interface pressure distribution in bolted joint.

Among the four aging process parameters, the second stage aging temperature and holding time are the main factors that affect the final results, while the first stage aging temperature and holding time are secondary factors.
Through this test we will find the major influencing factors and secondary influencing factors among the four parameters, and optimization the aging process according the test results.
The main parameters affecting the final aging result are aging temperature Ⅱ and the holding time Ⅱ.
(2) The second stage of aging parameters are the main factors that impact the mechanical properties of 6082 aluminum alloy bumper, and the first stage aging parameters are secondary factors
Liu, Effect of heat treatment technology on mechanical properties of 6082 aluminum alloy profile and rod, J.

With more affecting factors than the tap water, the produced water, originating from the existence of complicated constituents in the water, leads to the worth viscosity of the PAM solution.
In this paper, the affecting factors were identified and evaluated by the analysis of the PAM operations of preparation, storage and production in Daqing oilfield.
The results show that the dominant physical factors are composed of the heat, storage time, mechanical stress and photo/sonic radiation.
Due to few affecting factors, good viscosity was kept in the solution.
With more affecting factors than the ground clean water, it, resulting from the existence of complicated constituents in the water, leads to the worth viscosity.

The effects of different process parameters on the microstructure and mechanical properties of Zr-based bulk metallic glass were studied by using four factors and four levels of orthogonal experiment.
When the casting temperature is low, the BMGs of structure and mechanical properties in the glass transition are affected by some atomic clusters that may be contained in the metal melt.
Therefore, this also explains why the 7#(2 mm) and 8#(3 mm) samples have better mechanical properties.
Orthogonal Experimental Analysis Mechanical Properties.
Effect of the cooling rate on the mechanical properties of Ti-Ni-Cu-Zr-based crystal/glassy alloys[J].

This is one of the main factors which constraint coalbed methane production yield.
In this paper, geological factors including the composition of coal petrography, the mechanical strength of coal petrography and coalbody structure destruction and engineering factors including drilling, fracturing and drainage were analyzed to study on the controlling factors on the output of pulverized coal.
Fig.1 The statistical results of reason for workover Controlling Factors on the Output of Pulverized Coal The genesis of pulverized coal is the result of multiple factors.
Geological factors mainly include the composition of coal petrography, mechanical strength of coal petrography and coalbody structure destruction while engineering factors mainly refer to the drilling, fracturing and drainage engineering.
Due to the difference of sedimentary environment and tectonic evolution, the properties of coal petrography are significantly different.

The mechanical properties of weld joint were evaluated by means of tensile tests and hardness test at room temperature.
High degree of reliability and safety are the most important factors in any industry.
The result from the analysis shows that, the major parameters affecting the welding mechanical properties are the type of tool geometry, followed by rotational speed and welding speed.
When the material is removed as chips, there will be not enough material to stir which consequently affects the mechanical properties of the joint.
Conclusion Based on this experimental study, the following observation and conclusion can be made: § By analysis of variance (ANOVA), the significant parameters affecting the weld mechanical properties are tool geometry and the combination of tool geometry and rotational speed

The results indicated that the proportion of meta-aramid fibrid in the aramid paper and the length of shorten aramid fiber are the main factors for affecting the strength and the other properties of aramid paper.
The aramid paper exhibits numerous excellent properties such as good thermal property, flame resistance, electrical insulation transformer, high dielectric strength, good mechanical properties, and was applied widely in many fields including electrical insulation, aero wing, radome, honeycomb panel, etc [2].
We prepared aramid fibrid at first, then the aramid fibrid and aramid shorten fiber were used to prepare aramid paper, we found tha the proportion of meta-aramid fibrid in the aramid paper and the length of shorten aramid fiber are the main factors for affecting the strength and the other properties of aramid paper.
The date in table 1 show that the aramid paper with a better strength and elongation are prepared, and the proportion of fiber/fibrid is the main factor for affecting the mechanism properties of aramid paper.
The content of aramid fibrid was the main factor for affecting the mechanism property of aramid paper, and the date showed that the aramid paper show a better strength when the proportion of fiber/fibrid is about 40/60.

This requires the development of new materials with higher mechanical, physical and chemical properties.
Independent factors The independent factors include all input parameters required for the technology.
Factors affecting the actual machining process material are shown in Table 1 and the factors affecting the flow of water itself in table 2 [1, 8, 9].
Hydraulic factors in AWJ Working pressure is also one of the most important factors that affect the cutting of materials.
Fig. 7 The influence of the depth of the water-jet cutting Conclusion Improving the quality of surface properties of materials in the cutting plane requires accurate monitoring the state of the machined surface also monitoring the status of input technological and material factors by abrasive water jet.

Mechanical Properties and Microstructure of Reaction Sintering B4C/SiC Ceramics W.S.
Results showed that the carbon content and the value of carbon relative density (ρCRD) in the green bodies were the major factors affected the composition, that is, the free silicon and carbon contents and mechanical behaviors of sintered specimens.
Table 2 lists the mechanical properties and porosity of the sintered specimens.
It can be summarized from Table 1 and Table 2 that the value of carbon relative density significantly affects the mechanical properties of the sintered materials, as can be seen from Fig 2.
Carbon content and the value of carbon relative density (CRD) in the green bodies were the major factors affected the mechanical properties of the reaction sintering B4C/SiC ceramics.