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Online since: January 2012
Authors: Nazanin Farhadyar, Mirabdullah Seyed Sadjadi
It is well known that the chemical properties of the solid surfaces and their geometry affect wettability of them with liquid.
Another factor affecting the hydrophilic property is the chemical structure of the surfaces.
For many applications, the desired properties of coatings are mainly as follows: good adhesion, good hydrophilicity of the surface, and improvement in comparison with pure organic or inorganic coatings used [5-7] Polymer coatings lead to good adhesion but do not really improve the mechanical properties.
The compatibility between the organic and the inorganic phase strongly affects the thermal, mechanical, and optical properties.
The hydrophilic properties of surfaces were confirmed by contact angle measurements.
Another factor affecting the hydrophilic property is the chemical structure of the surfaces.
For many applications, the desired properties of coatings are mainly as follows: good adhesion, good hydrophilicity of the surface, and improvement in comparison with pure organic or inorganic coatings used [5-7] Polymer coatings lead to good adhesion but do not really improve the mechanical properties.
The compatibility between the organic and the inorganic phase strongly affects the thermal, mechanical, and optical properties.
The hydrophilic properties of surfaces were confirmed by contact angle measurements.
Online since: August 2007
Authors: William H. Peter, G.Y. Wang, R.A. Buchanan, C.T. Liu, M.L. Morrison, C.R. Brooks, Peter K. Liaw
Many factors could be involved to cause the range in fatigue behavior, such as the mean
stress, specimen geometry, testing environment, temperature, cyclic frequency, residual stress,
quality of the glassy phase, and the surface condition.
In fact, any processing that changes the static mechanical properties or microstructure is also likely to affect the fatigue behavior of materials.
A good understanding of the most influential parameters affecting the fatigue endurance limits of BMGs is key to becoming knowledgeable about the fatigue behavior and fatigue degradation mechanics of BMGs.
However, the lifetime for a given surface finish over the fatigue-endurance limits was not affected.
Love: Properties of Metallic Surfaces, The Institute of Metals, London, (1953), p. 161
In fact, any processing that changes the static mechanical properties or microstructure is also likely to affect the fatigue behavior of materials.
A good understanding of the most influential parameters affecting the fatigue endurance limits of BMGs is key to becoming knowledgeable about the fatigue behavior and fatigue degradation mechanics of BMGs.
However, the lifetime for a given surface finish over the fatigue-endurance limits was not affected.
Love: Properties of Metallic Surfaces, The Institute of Metals, London, (1953), p. 161
Online since: February 2016
Authors: Marcin Leonowicz, Bartosz Michalski, Mateusz Szymański, Zbigniew Miazga
Demagnetization curve and magnetic properties for the best obtained powder are presented in Fig. 6.
Properties vary depending on the processing conditions.
Obtained properties are slightly better than presented in [8] and [9], where achieved properties were as follows: (BH)max of 46 kJ/m3 (worse), Mr 0,55 T (worse), Hci 750 kA/m (better) and (BH)max of 50 kJ/m3 (worse), Jr 0.58 T (worse) Hc 920 kA/m (better), respectively.
Magnetic properties of recycled powder (demagnetizing curve).
Final powder properties are determined by many factors, including chemical composition of magnets, size of particles, processing parameters etc.
Properties vary depending on the processing conditions.
Obtained properties are slightly better than presented in [8] and [9], where achieved properties were as follows: (BH)max of 46 kJ/m3 (worse), Mr 0,55 T (worse), Hci 750 kA/m (better) and (BH)max of 50 kJ/m3 (worse), Jr 0.58 T (worse) Hc 920 kA/m (better), respectively.
Magnetic properties of recycled powder (demagnetizing curve).
Final powder properties are determined by many factors, including chemical composition of magnets, size of particles, processing parameters etc.
Online since: February 2011
Authors: Zhen Yuan Jia, Fu Ji Wang, Jian Wei Ma, Jiang Yuan Yang, Di Song
The study of contact characteristics of ball screw will provide theoretical bases for improving transmission efficiency and working properties of ball screw.
(19) From the Eq. 19, it is deduced that the axial contact stiffness of ball screw is affected by factors such as load, design parameters and manufactured material properties, etc.
It could provide theoretical basis for optimal structure design of ball screw via analysis of these influencing factors.
In order to satisfy demand of actual utility, it is necessary to comprehensively consider the influence of material properties.
Zhang: China Mechanical Engineering Vol. 19 (2008), p. 1079-1083
(19) From the Eq. 19, it is deduced that the axial contact stiffness of ball screw is affected by factors such as load, design parameters and manufactured material properties, etc.
It could provide theoretical basis for optimal structure design of ball screw via analysis of these influencing factors.
In order to satisfy demand of actual utility, it is necessary to comprehensively consider the influence of material properties.
Zhang: China Mechanical Engineering Vol. 19 (2008), p. 1079-1083
Online since: June 2012
Authors: Hai Yun Jin, Rui Dong Niu, Li Xia Liu, Bao Qiang Lv, Shun Liu
The mechanical properties and densities of the samples were measured; then the specimens were identified by XRD and the microstructure was observed by SEM.
The influence of sintering temperature and sintering time on the properties of the ceramic proppant was investigated and then the reaction mechanism was explained. 1.
Some mechanical and physical properties of the sample were measured.
Sintering temperature and holding time had a great influence on the properties of the ceramic product.
The dimensions of the particles, the number and composition of the liquid phrase as well as the number and the morphology of the pores will be directly affected by sintering temperature; then the properties of the ceramic proppant will be influenced by those above comprehensive factors.
The influence of sintering temperature and sintering time on the properties of the ceramic proppant was investigated and then the reaction mechanism was explained. 1.
Some mechanical and physical properties of the sample were measured.
Sintering temperature and holding time had a great influence on the properties of the ceramic product.
The dimensions of the particles, the number and composition of the liquid phrase as well as the number and the morphology of the pores will be directly affected by sintering temperature; then the properties of the ceramic proppant will be influenced by those above comprehensive factors.
Online since: August 2012
Authors: Hryhoriy Nykyforchyn, Volodymyr Kyryliv, Volodymyr Hutsaylyuk, Tomasz Ślęzak, Janusz Torzewski, Dorota Kocańda
FSW) that are difficult to join by means of traditional methods without reducing their fatigue properties.
The joint's mechanical properties slightly improved in relation to the base material.
These ones are characterized by good welding properties and cold crack resistance.
The steels' chemical compositions and mechanical properties are presented in Table 1.
Nogi, Effect of tool shape on mechanical properties and microstructure of friction stir welded aluminium alloys, Mater.
The joint's mechanical properties slightly improved in relation to the base material.
These ones are characterized by good welding properties and cold crack resistance.
The steels' chemical compositions and mechanical properties are presented in Table 1.
Nogi, Effect of tool shape on mechanical properties and microstructure of friction stir welded aluminium alloys, Mater.
Online since: July 2012
Authors: H. Kamarudin, Che Mohd Ruzaidi Ghazali, Luqman Musa, A.M. Mustafa Al Bakri, C.Y. Heah, Y.M. Liew, Ismail Khairul Nizar, M. Binhussain
Curing regime for the geopolymer are important factors that must be taken into consideration when designing a kaolin-based geopolymer product for a specific application [5, 6].
Kaolin geopolymer needed thermal activation in order to obtain hard structure and good properties.
Chaudhary, Mechanism of geopolymerization and factors influencing its development: A review.
Njopwouo, Effects of calcination temperature of kaolinite clays on the properties of geopolymer cements.
Martinez-Ramirez, Alkali Activation of Metakaolins: Parameters Affecting Mechanical, Structural and Microstructural Properties.
Kaolin geopolymer needed thermal activation in order to obtain hard structure and good properties.
Chaudhary, Mechanism of geopolymerization and factors influencing its development: A review.
Njopwouo, Effects of calcination temperature of kaolinite clays on the properties of geopolymer cements.
Martinez-Ramirez, Alkali Activation of Metakaolins: Parameters Affecting Mechanical, Structural and Microstructural Properties.
Online since: October 2020
Authors: Yong Guo Wang, X.R. Shi, L. Chen, W.L. Ge
Introduction
Compacted graphite iron (CGI) is considered to be one of the most promising material and have an increasing demand in both automotive and locomotive industries due to its unique physical and mechanical properties.
Coating techniques is also used to improve the hardness and were resistance of cutting tool, as well as decrease the friction coefficient of the tool-chip interface, result in a better comprehensive properties of the tool[3].
Wang Yongguo et al.[17] established a carbide gun drill force system by the integration of forces on the main cutting edge, wear pad and outer diameter (OD) relief, and the mechanical equilibrium equations, applying specific energy model, which consisted of the geometry parameters, machining parameters, and material properties.
While all above the studies greatly improved the knowledge of CGI machining performances, wear mechanisms of the tool, or the factors affecting tool life.
The chemical composition (wt%) and mechanical properties of workpiece material are presented in Table 1 and Table 2 respectively.
Coating techniques is also used to improve the hardness and were resistance of cutting tool, as well as decrease the friction coefficient of the tool-chip interface, result in a better comprehensive properties of the tool[3].
Wang Yongguo et al.[17] established a carbide gun drill force system by the integration of forces on the main cutting edge, wear pad and outer diameter (OD) relief, and the mechanical equilibrium equations, applying specific energy model, which consisted of the geometry parameters, machining parameters, and material properties.
While all above the studies greatly improved the knowledge of CGI machining performances, wear mechanisms of the tool, or the factors affecting tool life.
The chemical composition (wt%) and mechanical properties of workpiece material are presented in Table 1 and Table 2 respectively.
Online since: September 2014
Authors: Min Jiang, Ming Yu Huang, Jun Ma, Dong Yun Su, Hong Jun Ni, Xing Xing Wang
Different inorganic fillers are used to alter the properties of neat polymer.
Those materials are known for their excellent thermal and chemical stabilities and mechanical properties.
The presence of functional groups on filler might generate a variety of interactions such as covalent, ionic, hydrogen bonding etc. with polymer matrix affecting the properties of composite.
The presence of functional groups on filler might generate a variety of interactions such as covalent, ionic, hydrogen bonding etc. with polymer matrix affecting the properties of composite.
The influence of POSS functionality on hybrid membrane’s thermo-mechanical properties, morphology, water uptake and proton conductivity was investigated.
Those materials are known for their excellent thermal and chemical stabilities and mechanical properties.
The presence of functional groups on filler might generate a variety of interactions such as covalent, ionic, hydrogen bonding etc. with polymer matrix affecting the properties of composite.
The presence of functional groups on filler might generate a variety of interactions such as covalent, ionic, hydrogen bonding etc. with polymer matrix affecting the properties of composite.
The influence of POSS functionality on hybrid membrane’s thermo-mechanical properties, morphology, water uptake and proton conductivity was investigated.
Online since: July 2015
Authors: Kozo Kanayama, Tsunehisa Miki, Masako Seki, Rumiko Nakaya, Soichi Tanaka, Nobuo Sobue, Ichinori Shigematsu
Introduction
Wood is a natural polymer composite with superior mechanical properties.
Wood flow forming have been developed as a plastic forming technique for solid woods aiming at improving both the mechanical properties and a press-formability such as near-net shape forming.
Physical and mechanical properties of this wood-PF composite were equivalent to the PF resin namely about 100 MPa of the bending strength and less than 1 % in a size-stability against 1 hour-boiling water [5].
According to studies related to wood under non-equilibrium state, the mechanical and visco-elastic properties of wood are drastically altered during environmental changes such as temperature and humidity.
The specimens were cut by a numerically-controlled milling machine from a tangential section board with a continuity in the longitudinal direction to minimize a variety in mechanical properties.
Wood flow forming have been developed as a plastic forming technique for solid woods aiming at improving both the mechanical properties and a press-formability such as near-net shape forming.
Physical and mechanical properties of this wood-PF composite were equivalent to the PF resin namely about 100 MPa of the bending strength and less than 1 % in a size-stability against 1 hour-boiling water [5].
According to studies related to wood under non-equilibrium state, the mechanical and visco-elastic properties of wood are drastically altered during environmental changes such as temperature and humidity.
The specimens were cut by a numerically-controlled milling machine from a tangential section board with a continuity in the longitudinal direction to minimize a variety in mechanical properties.