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Online since: April 2020
Authors: Bauyrzhan Rakhadilov, Zhuldyz Sagdoldina, Dosym Erbolatuly, Dastan Buitkenov
The main factors affecting the pattern of formation of detonation coatings are heating, melting (full or partial), deformation and spreading of particles on the surface.
Cross section of coatings after thermal annealing: a) 700 °C, b) 800 °C, c) 900 °C One of the main factors determining the quality of the coating, affecting the duration of the work, is adhesion.
EL-Raghy, Processing and mechanical properties of Ti3SiC2, J.
Watanabe, Mechanical properties of Polycrystalline Ti3SiC2 at ambient and elevated temperatures, Acta Materialia. 49 (2001) 937-945
Barsoum, Microstructure and mechanical properties of porous Ti3SiC2, Acta Materialia. 53 (2005) 4359-4366
Online since: September 2018
Authors: Victoria A. Gurieva, Aleksandr V. Doroshin, Viktor V. Dubineckij
Therefore, the primary practical importance is the ways to regulate the structure and properties of the final product as a result of rational use of the balance of internal forces of the initial disperse system, which is predetermined by the energy factors of interfacial surface layers.
In this connection, at the first stage, the influence of the dispersion of the raw material charge in a ball mill on the physical and mechanical properties of ceramic materials was investigated.
The burning properties of the samples are shown in Fig.1,2.
Based on the results shown in Figures 1 and 2, it can be seen that the properties of calcined ceramic samples are affected by the duration of dispersion of the feedstock, as well as the calcination temperature.
Based on the results shown in Figures 1 and 2, it can be seen that the properties of the crystals are affected by the duration of the dispersion.
Online since: September 2023
Authors: Petrica Radu, Valentín Miguel, Enrique García-Martínez, Carol Schnakovszky, Eugen Herghelegiu
The interest in the use of these alloys is since they combine a very low density, lower than the Ti6Al4V alloy typically used in these applications, and exceptional mechanical properties at high temperatures.
Titanium aluminides can be described as Ti-(42÷49)Al-(0.1÷10)X, with X standing for alloying elements such as Nb, Cr, V, Ta, Mo, Zr, W, Si, C, and B, added to improve their mechanical properties [10,11].
Lubrication strategy is also a factor heavily affecting the wear mechanism and tool life because it reduces mechanical wear such as the abrasion on the tool rake face [32, 33, 35, 40, 44].
Surface integrity The integrity of the machined surface is the result of several factors associated with the milling process of titanium aluminides such as technological parameters, geometry and wear of the tool, as well as the properties and microstructural changes of the workpiece material.
According to the reviewed papers, surface roughness shows dependence on the process parameters, among which cutting depth was the most significant factor affecting it, followed by feed rate and cutting speed [41, 44].
Online since: June 2021
Authors: Tibor Czigány, Dániel Gere, Ferenc Ronkay
Therefore, the aim of the study was to analyze the mechanical and optical properties, and the compostability of different low-density polyethylene (LDPE) and poly(butylene adipate-co-terephthalate) (PBAT) compounds.
Results and Discussion Mechanical properties of the blends Fig. 1 shows the tensile curves of the PBAT-based (a) and LDPE-based (b) blends of different weight fractions.
The tensile curves of LDPE were similar in both cases because the properties of hydrophobic LDPE were not affected by drying or conditioning.
Pukánszky, Processing induced segregation in PLA/TPS blends: Factors and consequences, Express Polym.
Czigany, Rheological and mechanical properties of recycled polyethylene films contaminated by biopolymer, Waste Manage. 76 (2018) 190-198
Online since: August 2013
Authors: Wei Zhang, Su Fen Dong
Foam ability and stability of foaming agent are key factors for foam concrete properties.
Foaming agent is a key factor in determining foam concrete properties including compressive strength, heat insulation, sound insulation and cracking.
Foam ability and stability of foaming agent are affected by many factors [3].Using HPMC as foam stabilizer, under the basic of preparing 600kg/m3 foam concrete, LAS, SDS and magnesite foaming agent foam ability and stability are studied.
Study on foaming agent properties Study on LAS foam ability and stability LAS is straight chain structure.
Structure and properties of aerated concrete: A review [J].
Online since: May 2012
Authors: Wen Fu Zhou, Yan Qian He, Ye Yong Yan
The mechanical properties of PMC are related to the performances and contents of reinforcing fibers and matrix resins, and are largely determined by the integration degree between the interfaces of the fiberglass and the resin.
The interfacial invasiveness and cohesion are some key factors to affect the mechanical properties of phenolic molding compounds [1-3].
Modified fiberglass instead of wood flour can highly enhance the PMC performances with better properties of heat resistance, mechanical strength and dimensional stability, and the product can replace metals used in automotive, mechanical and electrical manufacturing applications [4-7].
Property Standard Volume resistivity GB / T 15662-1995 Surface resistivity GB / T 22042-2008 Impact strength GB / T 18029.8-2008 Electric strength GB / T 1408 Bending strength GB / T 11387-2008 Weight GB / T 1033.1-2008 Fluidity GB / T21060-2007 Heat deformation GB / T 1634.2-2004 Results and discussion 3.1 Surface free energy Fiberglass surface free energy is the major factor to affect its properties such as invasiveness, cohesion and bonding.
The measured properties of these PMC samples are shown in Table 5.
Online since: December 2014
Authors: Lei He, Zhi Wei Han, Zi Xia Feng, Yan Ren
The results show that:(1)the adjustment of the slope ratio and platform can significantly affect the slope displacement and plastic zone distribution, reasonable slope ratio and platform can reduce the horizontal displacement and plastic zone of slope, increase the safety factor and stability;(2)the slope monitoring results show that numerical simulation optimization design is feasible, and the excavation slope maintain security and stability during the construction period, and economic benefit has been obtained.
The physical and mechanical property parameters of stratums are shown in Table 1.
Physical and mechanical parameters of corresponding strata are in Table 1, and the cohesion and internal friction angle of structure surface used in the numerical calculation should consider the impact of the joint surface.
Slope ratio refers to the ratio of the slope grading, and slope ratio directly affects the footprint, security and stability of the slope engineering.
The safety factor of programs 1,2 slope are less than 1.0, so the slope will occur sliding failure in the excavation process; slope safety factor of program 3,4,5 are greater than 1.0, and show an increasing relationship but neither of the safety factor reach the current regulatory requirements 1.30, hence slope ratio adjustment should be combined with other support methods to strengthen the slope and ensure project safety. ④When other conditions remain unchanged, the smaller the slope ratio is, the bigger the safety factor of the slope is, and the more stable the slope is.
Online since: January 2012
Authors: Djamel Ouinas, Mohamed Sahnoun
Thus, a study of the relations that can exist between the geometrical defects of surfaces and the metallurgical defects of volumes as well as the material properties that resist to the crack propagation is very important.
Finite element model Let us consider an elastic thin aluminium plate with a semicircular lateral notch having the following dimensions: length ; a width , thickness and a notch radius The properties of the material of the plate are: Young’s modulus E and Poisson ratio The mechanical characteristics of the material are shown in the Table 1.
The stress intensity factors, which govern the fracture process in the LEFM context are calculated by using modified crack closure techniques.
Sih, Handbook of Stress Intensity Factors Lehigh University Bethehem PA, (1973)
Peterson, Stress Concentration Factors New York: John Wiley & Sons, Inc (1974)
Online since: July 2012
Authors: Si Wei Wen, Shi Tong Li, Chao Yi Peng, Su Li Xing, Shun Yong Wang, Ren Li, Fei Hu Yu
The mechanical properties of unidirectional M40J/epoxy composites, prepared by molding process, were studied.
Introduction Adhesively bonded composite repair is a method to resume the mechanical properties of the cracked structure by bonding with composite patches.
Results and Discussion 3.1 Properties of M40J/Epoxy Composite.
The unidirectional M40J/epoxy composite exhibits marvelous mechanical properties, as shown in Table 1.
Moreover, both cure cycles and bonded methods are important factors of the effectiveness of the repaired specimens.
Online since: September 2013
Authors: Yun Tong
Concerning the ecological sizing, the key factors such as size property, sizing recipe as well as technique parameters known as sizing regain, moisture regain, elongation regain, squeezing pressure, viscosity of size glue, solid content and other factors has been discussed.
Performance of sizing film The experiment of the mechanical properties of sizing film are shown as table 2 Table 2 Performance of sizing film of size in experiment ITEM PR-Su CP-L PVA-1799 PAM Phosphate Ester Starch Breaking strength /N.mm-2 29.81 38.86 28.7 29.2 36.95 Breaking elongation/ % 3.39 7.36 258.97 284 3.99 Abrasion resistance/mg.cm-2 0.291 0.709 0.467 0.347 0.583 Bending endurance 1259 1409 >10000 2000 136 Hygroscopicity/ % 17.66 15.55 9.27 6.74 7.3 Shown by table 2, we can make the conclusion that PR-Su and CP-L, Phosphate Ester Starch of ecological size is better than or close to PVA in term of breaking strength and abrasion resistance, but their breaking elongation is inferior to that of PVA and PAM, the hygroscopicity of PR-Su and CP-L is much higher than PVA , PAM and Phosphate Ester Starch, meaning the former are favor to be affected by humidity of environment.
Since the single ecological size is reluctant to meet the requirement of warp sizing particularly for the fine fabric with high density in term of mechanical properties, it is inevitable for the current ecological size to be mixed with other various size ingredient and auxiliaries. 3.
Trauter1 Investigation on Changesin Physical and Technological Properties of Water Soluble Sizing Agents During the Ultrafiltration Process Part Ⅰ〔J .
Trauter1 Investigation on Changes in Physical and Technological Properties of Water Soluble Sizing Agents During the Ultrafiltration Process Part Ⅱ〔J 〕.
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