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Mechanical and thermal properties of nano-SiO2/PA66 composites Xiuchi Hu1,a, Xiangmin Xu1, Yudong Zhang2, Binjie Li2, Zhijun Zhang2 1Department of Mechanical and Electrical Engineering, Yellow River Conservancy Technical Institute, Kaifeng, Henan, 475000, China 2Key Lab for Special Functional Materials, Henan University, Kaifeng, Henan, 475000, China aEmail: huxiuchi@126.com Keywords: Composites; Nano-SiO2; Mechanical properties; Thermal properties; Abstract.
Compared with their neat counterparts, the nanocomposites exhibit superior properties such as enhanced mechanical and thermal properties, improved barrier performance and flame retardancy [1-7].
PA66, a semi crystalline thermoplastic polymer, has been widely used for numerous engineering applicants, due to its combination of good processing properties, high rigidity and excellent mechanical properties.
The influence of nano-SiO2 on the mechanical and thermal properties of the materials is rarely discussed.
Microstructure and mechanical properties of microcellular injection molded polyamide-6 nanocomposites.

The existence of banded structure not only affects the strength, toughness and other mechanical properties of the steel but also the thermal processing and welding performances.
The inspection process is subject to human factors.
Conclusion In general, the presence of banded structure mainly affects the corrosion resistance, strength, toughness and other mechanical properties of petroleum pipe.
The microstructure of petroleum pipe is affected by many factors such as the alloy composition and rolling technique, which explains its diversified banded structures.
Effect of quenching temperature on microstructure and mechanical properties of low-alloyed corrosion resistance OCTG[D].

The input parameters of FC-CBGA from industry was used for simulation and the properties of commercial underfill were extracted by using Thermal Mechanical Analyzer (TMA) and Dynamic Mechanical Analyzer (DMA).
Differences in surface roughness, cleanliness, solder mask properties on the substrate and passivation properties on the silicon die could result in very different fillet geometries for the same underfill.
Dynamic mechanical properties such as Young’s modulus of cured samples were determined from -50 0C to 210 OC using DMA techniques.
The thermo-mechanical properties of components in FC-CBGA is shown in Table 1.
The material properties used in the computational modeling are given in Table 1..

Keywords: water atomization; iron powder; high compressibility; influence factors Abstract: In this paper, the influence factors on high compressibility water atomized iron powder LAP100.29 were studied such as the processing parameters, the proportion of coarse particles, powder oxygen content and impurity.
Therefore, in order to improve the production techniques and competitiveness of the domestic atomized iron powder, it is a significance to study the influence factors on the compressibility of iron powder. 2 Experimental Methods Manufacturing process of water atomized iron powder is carried out according to the normal process specification of the production enterprise.
Therefore the analysis of the factors affecting the compressibility of water atomized iron powder was carried out from the various process parameters, such as melting temperature, purity of molten steel, reduction temperature, particle size and distribution, etc. 3.1 Optimization of powder production process According to the analysis of current production process of water atomized iron powder, the production process needs further optimization and improvement in order to obtain the green density more than 7.20 g/cm3 under the pressure of 600 MPa.
Li, The test of improve the flow properties of reduced iron powder, Powder metallurgy industry, 22 (2012) 17-19
Yi, Advances in technology of powder metallurgy with high-speed pressing densification, Materials for Mechanical Engineering, 32 (2008) 5-8

The four processing parameters i.e laser power, scan speed, scan spacing and layer thickness are the crucial factors that ensure complete bonding (fully melted powder, good interlayer bonding) between successively fabricated layers [2].
Previous work shows that the mechanical properties of laser sintered parts are comparable with those produced by machining or casting [3].
L.E Murr et al demonstrated that both laser and electron beam melting (EBM) are a viable technique for processing metal or alloy powders, specifically using Ti6Al4V, with a suitable microstructure leading to good mechanical properties [6].
There are two appealing factors associated with this technique; firstly the capability of processing metallic powders and secondly the capability of the machine to fabricate geometrical complexity in a relatively lower time at lower cost with minimum technical expertise required.
Herres, G.Levy, Influence of the particle size distribution on surface quality and mechanical properties in AM steel parts, Rapid Prototyping Journal 17/3 (2011) 195-2023 [5] J.

As integration degree of the circuits becoming higher, the requirement for thermal conductivity, mechanical properties and reliability of substrates become higher too.
For those reasons, carbon nanotubes (CNTs), which have excellent thermal conductivity and mechanical properties [2,3], were adopted to reinforce AlN ceramics.
In this paper, CNTs was used for improving the thermal conductivity and mechanical properties of AlN.
The properties and microstructure of CNTs/AlN ceramics were primarily studied in our present works.
Because of the density is one important factor affecting the bend strength and thermal conductivity of CNTs/AlN, so that those two performances degraded with density.

There are numerous factors that influence sheet metal forming including but not limited to the shape of the die, properties of the material, shape of the blank, boundary conditions, friction and lubrication conditions between the die and the blank [2].
Therefore, finding out the obvious factors and selecting the optimum level of the factors are very important when designing a sound mould.
Its mechanical properties are shown in Table 1.
So considering all the factors, the optimum scheme is A1B1C1.
The factors influencing forming effect can be found by numerical simulation, and then the levels of the factors are chosen.

Microstructure–mechanical properties relationship for ZrB2-based ceramics is complex.
Strength factors are both the grain size of ZrB2 and the size of the dispersed SiC particles.
Prisyazhna, Structure, mechanical properties, and high-temperature stability of ZrB2- and HfB2-based materials, J.
Hilmas, Mechanical Properties of Zirconium-Diboride Based UHTCs. in: W.
Silvestroni, ZrB2–SiC ceramics: Residual stresses and mechanical properties, J.

Such changes are undesirable, since they may directly affect the chemical, physical and mechanical properties of the products.
Significant deterioration of the mechanical properties of polyolefins was observed after 15 days of accelerated ageing at an elevated temperature [5].
Moreover, the mechanical properties results confirmed that both the unfilled PP and the PP/wood-fiber composites exhibited good UV radiation resistance.
Akcelrud: The effect of accelerated ageing on the surface mechanical properties of polyethylene.
Dulebová: The utilize of gamma radiation in the examination of mechanical properties of polymeric materials.

., Petroleum University of China, Qingdao 266555, Shandong, China gaofuju@upc.edu.cn Keywords: coastal saline soil, mechanical properties, foundation and basis, design and construction, artificial planting Abstract.
Based on the recent 20 years' observation and research, this paper briefly discusses the mechanism of forming, mechanical properties of coastal saline soil and the main factors which bring the important influence to buildings.
The Forming, Physical and Engineering Properties of Saline Soil in Dongying The Forming of Saline Soil in Dongying Dongying is located at the Yellow River Delta.
Chlorine ion content is the key and major index of soil erosive environment, and relating to other factors, such as oxygen content and the covering conditions—interface of fry and wet alternating exist or not.
The mechanics of saline soil is defined mainly by the following factors: salt, water and soil, which form the complexity of appraising saline soil mechanics.