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Online since: March 2009
Authors: Péter Arató, Csaba Balázsi, Nikoletta Kaulics Helmeczi, Maria Berkes Maros
The test pieces had pure β-Si3N4
microstructure with a grain boundary glassy phase [9].
For loading rates of 0,78 and 2,88 m/s 5-5 specimens were tested, however the number of valid test data were occasionally less (see test results).
For loading rates of 0,78 and 2,88 m/s 5-5 specimens were tested, however the number of valid test data were occasionally less (see test results).
Online since: October 2014
Authors: Zhi Gang Liu, Qian Kun Wang, Ya Ping Xiao, Peng Li
Metro system managed by GIS, property information shared by BIM, achieves integration between fine-grained structures and the overall, especially in theoperation and maintenance phase, itsfunctions to managepropertyandbrowse 3D models help to maintain pipes and equipment auxiliary.
The project name is Research on Real-time Monitoring Displacement System of Mine Dangerous Area Based on LabVIEW with the project number KY2012-01.
The project name is Research on Real-time Monitoring Displacement System of Mine Dangerous Area Based on LabVIEW with the project number KY2012-01.
Online since: June 2008
Authors: José M. Gallardo, Francicso Gomez Cuevas, Juan Manuel Montes Martos, Petr Urban
Based on some metallic elements, amorphous metal alloys can be obtained in a large
number of systems by various methods, such as rapid solidification from the melt [3] or mechanical
alloying (MA) [4].
It was found that the initial stage of milling, up to 5 h for Al50Ti50 and less than 20 h for Fe75Si25 (not shown in fig. 1), resulted in decreasing the intensities and broadening the width of all the diffraction peaks, which indicates a grain size reduction.
It was found that the initial stage of milling, up to 5 h for Al50Ti50 and less than 20 h for Fe75Si25 (not shown in fig. 1), resulted in decreasing the intensities and broadening the width of all the diffraction peaks, which indicates a grain size reduction.
Online since: October 2009
Authors: Stefano Cavalleri, Sergio Baragetti, Federico Tordini
The pinion tooth number is 25 and the pitch diameter 64.89 mm,
whereas the same parameters for the driven gear are, respectively, 22 and 57.10 mm.
Subsurface initial cracks parallel to the external surface having initial lengths of the order of the minimum grain size, i.e. 0.025 mm for the titanium alloy and 0.065 mm for the steel alloy, were simulated [17].
Subsurface initial cracks parallel to the external surface having initial lengths of the order of the minimum grain size, i.e. 0.025 mm for the titanium alloy and 0.065 mm for the steel alloy, were simulated [17].
Online since: February 2007
Authors: Seiji Ban, Masahiro Nawa, Hideo Sato, Y. Suehiro, H. Nakanishi
Measurements of Vickers hardness number (VHN) were repeated 6 times in each specimen
before and after sandblasting (0.2 MPa) of Y-TZP and the nanocomposite.
Kosmac et al. also reported that sandblasting significantly increased the biaxial flexure strength of fine and course grained Y-TZP [10], and significantly decreased with annealing at 900˚C for 1 h [3].
Kosmac et al. also reported that sandblasting significantly increased the biaxial flexure strength of fine and course grained Y-TZP [10], and significantly decreased with annealing at 900˚C for 1 h [3].
Online since: December 2006
Authors: Qing Hong Le, Lin Teng
GNC complex products always consist of a large number of components from different
disciplines.
Internal Stress Crack Bubble Casting Process Mixture Radio Curing Agent Flexibillizer Epoxy Resin Filler Vacuum Resin Casting Mechanical Agitation Granularity distribution Dosage Type Grain Diameter Contractibility Elasticity Fig.2 The RCA model of epoxy resin composition casting failure Conclusion The purpose of this study was to construct an effective CAI system which can manage knowledge across our own organization and other domains, also provide structure, simplicity and predictability to the innovation process for GNC complex products.
Internal Stress Crack Bubble Casting Process Mixture Radio Curing Agent Flexibillizer Epoxy Resin Filler Vacuum Resin Casting Mechanical Agitation Granularity distribution Dosage Type Grain Diameter Contractibility Elasticity Fig.2 The RCA model of epoxy resin composition casting failure Conclusion The purpose of this study was to construct an effective CAI system which can manage knowledge across our own organization and other domains, also provide structure, simplicity and predictability to the innovation process for GNC complex products.
Online since: February 2011
Authors: Shahrum Abdullah, Mohd Basri Ali, Mohd Zaki Nuawi, M.M. Padzi, K.A. Zakaria
While the presence of the excess silicon improves age hardening response, it may however reduce the ductility and cause intergranular embrittlement, due to the segregation of excess silicon to grain boundaries [1,2].
It is estimated that more than half the cars on the road today ride on alloy rims and the popularity of this wheel style is hard to top for a number of reasons, but there are some potential pitfalls to watch out when an alloy is selected.
It is estimated that more than half the cars on the road today ride on alloy rims and the popularity of this wheel style is hard to top for a number of reasons, but there are some potential pitfalls to watch out when an alloy is selected.
Online since: December 2010
Authors: Hong Xia Shao, Yan Ding, Jin Sheng Liang, Qing Guo Tang
The rigidity of the mineral filler grain reduces the volume shrinkage of the adhesive layer, which can eliminate internal stress and avoid transparent glue, short glue, reduce air bubbles and other defects.
However, the bonding strength of the plywood will be affected when a large number of holes or other defects between wood appear, because the adhesive layer contraction is increased as the glue increases excessively. 3.3 Effects of the different types of fillers on the adhesive bonding strength and the free formaldehyde content of the plywood Table1 Bonding strength and free formaldehyde content of the plywood with different fillers Filler Bonging strength (MPa)* Formaldehyde content (mg/L) Flour 1.738 4.6 Talc 0.539 4.4 Kaolin 1.11 3.67 Attapulgite 0.974 3.5 Modified attapulgite 1 0.925 3.0 Modified attapulgite 2 1.24 2.1 Modified attapulgite 3 1.26 2.6 Modified Mineral composite powder 1.502 1.6 *GB/T9846-2004 standard provisions the bonding strength of the grade 1 poplar plywood ≥0.7MPa.
However, the bonding strength of the plywood will be affected when a large number of holes or other defects between wood appear, because the adhesive layer contraction is increased as the glue increases excessively. 3.3 Effects of the different types of fillers on the adhesive bonding strength and the free formaldehyde content of the plywood Table1 Bonding strength and free formaldehyde content of the plywood with different fillers Filler Bonging strength (MPa)* Formaldehyde content (mg/L) Flour 1.738 4.6 Talc 0.539 4.4 Kaolin 1.11 3.67 Attapulgite 0.974 3.5 Modified attapulgite 1 0.925 3.0 Modified attapulgite 2 1.24 2.1 Modified attapulgite 3 1.26 2.6 Modified Mineral composite powder 1.502 1.6 *GB/T9846-2004 standard provisions the bonding strength of the grade 1 poplar plywood ≥0.7MPa.
Online since: June 2011
Authors: Cheng Ming Li, Li Fu Hei, Liang Xian Chen, Ying Ying Zhang, Jin Long Liu, Fan Xiu Lv
Compared with as-prepared diamond film, it means the increase in the number of graphite micro domains and sp2-bonded cluster as a result of incorporation of Ti, which may be attributed to the formation of nanographite or nanocarbides.
Small and uniform grains can be observed in Fig.8(a) and the film thickness is about 1μm in Fig.8(b).
Small and uniform grains can be observed in Fig.8(a) and the film thickness is about 1μm in Fig.8(b).
Online since: May 2012
Authors: Xiang Feng Zheng, Qing Wang, Yan Ting Feng, Xiao Guang Niu, Xiao Jun Hao, Wen Bin Li, Xue Xia Xu, Peng Sun
From metallographic examination, the main crack extended along grain boundary, and there were many small cracks paralleling with main crack.
The number of inspecting positions was not less than four for welding seam an for base metal and all inspection positions should be distributed uniformly along circular.
The number of inspecting positions was not less than four for welding seam an for base metal and all inspection positions should be distributed uniformly along circular.