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Online since: June 2020
Authors: Shahrul Azam Abdullah, Nurul Nazira Ishak, Noratiqah Syahirah Mohd Zarib
Firing steps is one of the most important steps as it significantly influences the properties of ceramic body.
Fluxes are the component that responsible for the properties of glaze.
Each glaze on ceramic that are produced by rice husk and bamboo leaves shows an improve properties by protect their color and their appearance.
Yuliana, Effect UV/O3 Modified Rice Husk on the Mechanical Properties of Recycle HDPE Rice Husk Composite.
Journal of Mechanical Engineering, 3 (2) (2017) 13-22
Online since: July 2011
Authors: Li Li Wang, Guang Cheng Yang, Jin Chen, Fu De Nie
The properties of YAG nanopowders obtained under different synthetic process were studied by XRD, TG-DSC, FT-IR and SEM.
Introduction Yttrium aluminum garnet (YAG, Y3Al5O12) polycrystalline transparent ceramic has turned into a potential laser host material because of its excellent properties, such as special compose, relatively stable lattice structure, and good thermal, mechanical, optical properties.
YAG nanopowders with excellent property is very important in the process of fabricating high-performance YAG transparent ceramics, consequently, many researchers pay more attention to the study of YAG nanopowders at present.
Dropwise speed and mode were major factors which affected the composition of product.
That soft agglomerate was mainly due to the bridging of adjacent particles with water by hydrogen bond which can be easily broken by mechanical force.
Online since: December 2012
Authors: Arul Maximus Rabel, Teena Abhraham, S. Karthick Raja Namasivayam
The coated fabrics were examined in the range of basic physical–mechanical parameters such as the tensile strength, the bursting strength and air permeability.Anti bacterial activity was determined against the clinical isolate of Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa by agar diffusion assay.
Moreover, functional finishes on textile fabrics are of critical importance to improve textile products with multifunctional properties such as antibacterial activity, UV protection, and wrinkle free properties.Nanotechnology is a highly emerging, inter disciplinary field, premised on the ability to manipulate structural materials on the level of individual atoms and molecules[2] The research interest for the use of nanotechnology in the textile industry has increased rapidly due to the fact that textile fabrics are some of the best platforms for deploying nanotechnology[3].With the advent of nanotechnology, a new area has developed in the realm of textile finishing.
Table 2 shows the effect of CUNp coating on the mechanical properties of cotton fabrics.
The strain reduced significantly in both warp and weft directions. the effect of nano-coating on cotton fabrics The CUNp coated fabric, due to its nano-size and uniform distribution, friction was found to be significantly lower.Air permeability is an important factor in the performance of textile materials used to provide an indication of the breathability of coated fabrics.
Effect of CUNPs treatment on mechanical properties of cotton fabrics Tensile strength Av. breaking load (kg) Strain (%) Treatment on fabrics Warp Weft Warp Weft Air permeability [m/(kPa.s)] Bursting strength (kg/cm2) Control 21×07 ± 2×10 18×79 ± 1×82 17×05 ± 1×72 13.07± 1×78 6×70 ± 0×89 4×30 ± 1×01 CUNPs 17×30* ± 1×35 20×61 ± 2×36 13×73 ± 1×10 11×60 ± 0×06 10×02 ± 1×77 5×56 ± 0×59 Table 3.
Online since: October 2010
Authors: Ya Long Liao, Fu Chang Xu, Xi Juan Chai
Experiments demonstrated that the Pd/C could catalyze dechlorination process effectively, which was affected by several factors such as reaction temperature, Pd/C ratio, and the induction of Pd/C catalyst, and that the dechlorination efficiency reached 88.2% under the optimal conditions of Pd/C loading ratio of 1.0% (mass), catalyst usage 12 g/L, H2 flowing rate 50 mL/min, and reaction temperature 90 for 120 min.
Due to its excellent film forming and protective properties, shellac is widely used in food industry, paint industry and pharmaceutical industry [1~10].
Compact chlorine affects the physicochemical properties of shellac.
On the one hand, it results in the poor storage properties[15].
For investigating the properties variation of low chlorine shellac, the samples of shellac with low chlorine prepared in this study was stored in refrigerator at 4~7℃.
Online since: January 2020
Authors: Gulnara I. Amerkhanova, Lyubov A. Zenitova, Aleksey I. Khatsrinov
These factors are partially mitigated by protective coatings, however, it increases the price of a material significantly.
Geo-grid meshes have a whole set of properties, that set them apart from fiberglass meshes: water, bio-, and light resistance, resistance to acid and alkaline environments, high mechanical fiber properties, depending on the material used and geo-grid making method (structure stability, elongation at break, creep of a material) [2, 3].
It helps to produce heavy-duty concretes with higher physical mechanical properties.
Krylov, Fiber reinforced concrete and its properties.
Abdullin, Effect of HF capacitive discharge plasma on physical mechanical properties of fibers and composite materials, Vestnik Kazanskogo tekhnologicheskogo universiteta, 7 (2010) 109-112
Online since: December 2013
Authors: Marek Tkocz, Marek Spyra, Eugeniusz Hadasik
However, accurate determination of the roll force during rolling at elevated temperatures is not obvious since it is affected by many factors, the primary amongst them being the flow stress of a rolled material.
These factors, along with the fact that the flow stress is not uniform along the roll gap, make determination of the average flow stress values in subsequent passes quite difficult.
The axisymmetric compression tests were conducted in the Gleeble thermo-mechanical simulator at the Institute of Ferrous Metallurgy in Gliwice [1] to determine the flow stress function of the Zn-Ti alloy investigated.
Due to lack of knowledge on physical and thermal properties of Zn-Ti alloy in the range of rolling temperature (50÷200oC), values representing relevant zinc properties were assumed in simulations: density – 7140 kg/m3, specific heat – 384 J/kgoC, thermal conductivity – 116 W/moC.
The following properties of cast-steel rolls were assumed: thermal conductivity – 30 W/moC, specific heat – 500 J/kgoC, density – 7800 kg/m3.
Online since: April 2008
Authors: Ivo Matoušek
The important factor affecting the forming efficiency is also a lifetime of forming tools that are loaded by hot glass melt cyclically.
However, the question is how design modifications affect the forming tool lifetime.
Thermal load of glass moulds Pressing moulds are stressed by combined load, namely periodic mechanical load (interactions of glass melt and forming tool during pressing) and cyclic thermal load.
In particular the thermal fatigue process initiated by cyclic loading of the forming tool working surfaces with hot glass melt is the critical factor negatively affecting the forming tools lifetime.
Owing to lack of information, a description of material properties at higher temperatures (σ-ε curves) is the critical stage of computer simulations.
Online since: December 2014
Authors: Qing Yun Zhao, Feng Lei Liu, Hong Huang
Fatigue damage is one of the important factors which affect aircraft life, and which more than 80% occurred in the joints of the structural elements of the aircraft.
Every hole is one of the fatigue source[1],so using longevity joint technology to improve the structural detail’s fatigue properties, mainly adopting split-sleeve cold expansion and interference installation system at the mainly bear frame to enhancing the life and decreasing the weight.
The fatigue test results were statistical analyzed in normal distribution and according to GJB/Z 18A-2005 ‘Data reduction and presentation of mechanical property for metallic materials’.
The stress condition and the surface quality of the hole’s wall are improved with cold expansion, which also enhance the property to resist fatigue and corrosion.
REFERENCES [1] Quanchun ZHANG, Yubing WANG, Lvhe ZHAI, “Advanced Aircraft Mechanical Joining Technology,” ISBN:7-80132-836-1/TH·91 · 2000 (In Chinese)
Online since: July 2011
Authors: C.Y. Zhang, Li Zhou, Shu Tao Huang
Huang1,c 1School of mechanical engineering, Shenyang Ligong University, Shenyang 110159, China azhangchunyang_1986@163.com,blizhou@imr.ac.cn,csyithst@yahoo.com.cn Keywords: SiCp/Al composites, Grinding, Temperature field, Heat flux Abstract.
Introduction Outstanding mechanical and physical properties of SiCp/Al composites such as high specific strength, stiffness and wear resistance indicate that this material plays an important role in application for engineering components.
So it is especially important to understand the factors which affect the grinding temperature.
The physical properties of the two kinds of wheel grain as shown in Table 1.
Solid model was built according to the actual size of experimental workpiece and the material properties of SiCp/Al composites are also shown in Table 1.
Online since: July 2014
Authors: Muthukumarasamy Maheshwaran, Sohil Thomas, Selvaraj Venkatram, N. Dinesh, B. Vijaya Ramnath, K. Venkataraman
As the engine is closed, the air cooling of the engine is affected, so a radiator is fixed to cool the engine.
The anchoring properties of Auxetic fibers would tend to lock the fibers into the matrix when debonding has occurred, leading to enhanced fiber-pullout resistance.
These characteristic materials display properties such as improved strength, acoustic behavior, improved fracture toughness, superior energy absorption, damping improvement, and indentation resistance.
These properties shows that auxetic fiber can be used for airbag manufacturing as it possess high tear strength.
Golias, “Overview of critical risk factors in Power-Two-Wheeler safety”.
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