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Online since: April 2018
Authors: Mihai Demian, Gabriela Demian, Luminița Grecu
In thermal power plants occur multiple and diversified physicochemical processes and therefore the design, construction and exploitation must consider the concepts of physics and chemistry, aerodynamics, heat engineering, material resistance, materials science and even the fault detection.
It is obvious; therefore, that selection of materials for use at high pressures and temperatures will be according to properties of metallic materials correlated with economic arguments.
After the application of the C1 criterion, the materials chosen for superheater are only three from ten.
Materials analyzed are: 10CrMo9-10, 13CrMo4-5, 16Mo3.
Table 2 Materials Onicescu function Rank 16Mo3 1.75 2 13 CrMo4-5 2 1 10CrMo9-10 2 1 The first position in this hierarchy is occupied, in this case by two materials: 10CrMo9-10 and 13 CrMo4-5, because Onicescu aggregation function has same value for both materials.
It is obvious; therefore, that selection of materials for use at high pressures and temperatures will be according to properties of metallic materials correlated with economic arguments.
After the application of the C1 criterion, the materials chosen for superheater are only three from ten.
Materials analyzed are: 10CrMo9-10, 13CrMo4-5, 16Mo3.
Table 2 Materials Onicescu function Rank 16Mo3 1.75 2 13 CrMo4-5 2 1 10CrMo9-10 2 1 The first position in this hierarchy is occupied, in this case by two materials: 10CrMo9-10 and 13 CrMo4-5, because Onicescu aggregation function has same value for both materials.
Online since: December 2011
Authors: Li Xia Jia, Rui Wang, Yun Juan Sun, Xing You Yang
Materials.
In this study the linking materials are one system of warp yarns。
The materials are Technical polyester filaments.
The Fig.2 shows that the linking materials were consolidated by resin.
The materials are glass filaments.
In this study the linking materials are one system of warp yarns。
The materials are Technical polyester filaments.
The Fig.2 shows that the linking materials were consolidated by resin.
The materials are glass filaments.
Online since: June 2021
Authors: Lei Qin, Hong Wei Ren, Peng Zhao, Geng Le Liu
Introduction
For most sleeve grouting materials, the basic combination consists of cementitious materials, mineral admixtures, admixtures and aggregates.
New Building Materials, 2002, (08): 40-1
Journal of Railway Science and Engineering, 2016, 13(04): 654-61
Journal of Railway Science and Engineering, 2015, 12(05): 1074-82
Journal of Henan Polytechnic University (Natural Science), 2011, 30(02): 206-10+24
New Building Materials, 2002, (08): 40-1
Journal of Railway Science and Engineering, 2016, 13(04): 654-61
Journal of Railway Science and Engineering, 2015, 12(05): 1074-82
Journal of Henan Polytechnic University (Natural Science), 2011, 30(02): 206-10+24
Online since: May 2014
Authors: Rainer Gadow, Patrick Weichand
The manufacturing technologies are fully developed and raw materials are cheap.
Standard epoxy or polyester materials are capable for temperatures up to 150 °C before they start to degrade.
The complex processing and the high priced raw materials make them unattractive for series parts.
Inert and active filler materials minimize this issue, hence fiber reinforcement is an option.
Fig. 9: Volume of wear of the tested friction materials after pin on disc measurement Further tribological investigations will concentrate on that temperature window, combined with different fiber architecture and filler materials.
Standard epoxy or polyester materials are capable for temperatures up to 150 °C before they start to degrade.
The complex processing and the high priced raw materials make them unattractive for series parts.
Inert and active filler materials minimize this issue, hence fiber reinforcement is an option.
Fig. 9: Volume of wear of the tested friction materials after pin on disc measurement Further tribological investigations will concentrate on that temperature window, combined with different fiber architecture and filler materials.
Online since: January 2011
Authors: Mario Rosso, Marco Actis Grande, Róbert Bidulský, L.A. Dobrzański, Zbigniew Brytan
Michel 5, 15100 Alessandria, Italy
2Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego St. 18a, 44-100 Gliwice, Poland
a zbigniev.brytan@polito.it
Keywords: stainless steel, duplex materials, materials properties
Abstract: The aim of the presented paper is to describe the sintered duplex stainless steels manufactured in sinter-hardening process and their structural and mechanical properties.
Pallavicini, Properties of vacuum sintered Duplex Stainless Steels, Journal of Materials Processing Technology 157-158 (2004) 312-316
Actis Grande, High density sintered stainless steels with improved properties, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 97-102
Rosso, Sintered Duplex Stainless Steels Corrosion Properties, Materials Science Forum 534-536 (2007) 721-724
Molenda, Processing and properties of sinters prepared from 316L steel nanopowders, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 73-76.
Pallavicini, Properties of vacuum sintered Duplex Stainless Steels, Journal of Materials Processing Technology 157-158 (2004) 312-316
Actis Grande, High density sintered stainless steels with improved properties, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 97-102
Rosso, Sintered Duplex Stainless Steels Corrosion Properties, Materials Science Forum 534-536 (2007) 721-724
Molenda, Processing and properties of sinters prepared from 316L steel nanopowders, Journal of Achievements in Materials and Manufacturing Engineering 21/2 (2007) 73-76.
Online since: June 2012
Authors: Zhi Yong Yang, Shun Hu Liu, Song Zhao, Jun Hu, Zeng Chan Lu
The aim of this paper was to obtain silo pressure calculating formula by consider of storage materials density stratified.
Introduction A silo is a common storage structure for a variety of bulk materials such as cement, coal, gravel, grains, and etc.
In Janssen theory, the density of the storage materials was a constant.
Pressure calculation by consider of storage materials density stratified Pressure calculation for deep bin.
Journal of Engineering Mechanics.Vol.127, No.10, October, 2001
Introduction A silo is a common storage structure for a variety of bulk materials such as cement, coal, gravel, grains, and etc.
In Janssen theory, the density of the storage materials was a constant.
Pressure calculation by consider of storage materials density stratified Pressure calculation for deep bin.
Journal of Engineering Mechanics.Vol.127, No.10, October, 2001
Online since: July 2013
Authors: Jing Zhang, Chao Liu, Liang Zhou, Yu Feng Dai
The traditional antenna is made up of metal or solid dielectric material, seawater is a new type of dielectric material for antenna.
With the development of science and technology, the antenna evolved from wire antenna to surface antenna, and to antenna with various complex functions.
Recently, a new kind of dielectric material is used as the antenna.
Compared with the traditional metal and dielectric antenna, its electrically conductive material is totally different.
Loschialpo, “Imaging of helical surface wave modes in the near field,”Journal of Electromagnetic Waves and Appl., Vol. 17, No. 11, 1593–1604, 2003.
With the development of science and technology, the antenna evolved from wire antenna to surface antenna, and to antenna with various complex functions.
Recently, a new kind of dielectric material is used as the antenna.
Compared with the traditional metal and dielectric antenna, its electrically conductive material is totally different.
Loschialpo, “Imaging of helical surface wave modes in the near field,”Journal of Electromagnetic Waves and Appl., Vol. 17, No. 11, 1593–1604, 2003.
Online since: May 2025
Authors: Wisam K. Tuama, Gyorgy L. Balazs
Balázs1,b
1Construction Materials Department, Budapest University of Technology and Economics, Budapest, Hungary.
Table 2 Summary of properties and effect of replacement materials.
Zhang, “Cement-based composite materials,” in Composite Materials Engineering, vol. 2, Springer Singapore, 2017, pp. 489–529. doi: 10.1007/978-981-10-5690-1_4
Čechmánek, “Influence of fibre type and fibre volume fraction on dynamic properties of slurry infiltrated fibre concrete,” in Materials Science Forum, Trans Tech Publications Ltd, 2016, pp. 135–140. doi: 10.4028/www.scientific.net/MSF.865.135
Yalçınkaya, “The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics,” Usak University Journal of Material Sciences, vol. 3, no. 1, pp. 97–97, Jun. 2014, doi: 10.12748/uujms.201416504
Table 2 Summary of properties and effect of replacement materials.
Zhang, “Cement-based composite materials,” in Composite Materials Engineering, vol. 2, Springer Singapore, 2017, pp. 489–529. doi: 10.1007/978-981-10-5690-1_4
Čechmánek, “Influence of fibre type and fibre volume fraction on dynamic properties of slurry infiltrated fibre concrete,” in Materials Science Forum, Trans Tech Publications Ltd, 2016, pp. 135–140. doi: 10.4028/www.scientific.net/MSF.865.135
Yalçınkaya, “The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics,” Usak University Journal of Material Sciences, vol. 3, no. 1, pp. 97–97, Jun. 2014, doi: 10.12748/uujms.201416504
Online since: April 2013
Authors: Ru Wang, Xiao Xin Shi, Pei Ming Wang
Styrene-butadiene rubber (SBR) latex is widely used to modify cement-based materials.
Experiment Raw Materials.
Materials used include PII 52.5 Portland cement, Styrofan D623 SBR latex and pure water.
Lapointe, Laboratory and field performance of polymer-modified cement-based repair mortars in cold climates, Journal of Construction and Buiding Materials. 16 (2002) 365-374
Schorn et al., From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete, Journal of Materials and Structures. 38 (2005) 601-607.
Experiment Raw Materials.
Materials used include PII 52.5 Portland cement, Styrofan D623 SBR latex and pure water.
Lapointe, Laboratory and field performance of polymer-modified cement-based repair mortars in cold climates, Journal of Construction and Buiding Materials. 16 (2002) 365-374
Schorn et al., From microstructure to macrostructure: an integrated model of structure formation in polymer-modified concrete, Journal of Materials and Structures. 38 (2005) 601-607.
Online since: August 2005
Authors: E.A. Levashov, V.V. Kurbatkina
Regularities of Composite Materials with Micrograded Grain Structure
Formation
V.V.
Introduction High-Temperature Synthesis (SHS) or combustion synthesis technique is applied widely to develop new materials including graded materials with progressive bulk changes in composition, structure and properties, dispersion strengthening materials, etc.
The properties of gradient and dispersion strengthening materials differ considerably from those of corresponded homogeneous materials [1- 5].
Kim and M.A Meyers: Materials Science and Engineering Vol.A206 (1996), p. 71
Metals Science Vol. 78 (4) (1994), p. 147, in Russian
Introduction High-Temperature Synthesis (SHS) or combustion synthesis technique is applied widely to develop new materials including graded materials with progressive bulk changes in composition, structure and properties, dispersion strengthening materials, etc.
The properties of gradient and dispersion strengthening materials differ considerably from those of corresponded homogeneous materials [1- 5].
Kim and M.A Meyers: Materials Science and Engineering Vol.A206 (1996), p. 71
Metals Science Vol. 78 (4) (1994), p. 147, in Russian