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Online since: March 2014
Authors: Bin Li, Hua Sheng Zhan, Xiao Ping Li, Jin Dong Su, Jun Hong Chen, Ming Wei Yan
Generally the generation of a large number of β-Sialon needs a high temperature above 1,650 °C, and usually the fineness of the raw materials is a few microns to a few tenths of a micron.
Under the experimental conditions, the particle size of the raw materials is large, the reaction temperature is low, but the X ray can detect a large number of β-Sialon.
The decomposition and volatilization of the oxides cause the lattices of the mullite and Al2O3 in the bauxite phase to be activated, then the decomposition and refinement phenomena occur in the large crystal grain aggregate and the activity increases, so as to make the silicon nitride, corundum and mullite be able to contact fully.
Therefore, a large number of fine columnar Sialon phase can be seen in the specimen 4.
At the same time, the bauxite refractory materials contain a large number of low melting point oxide impurities (TiO2, Fe2O3, K2O, Na2O, etc.).
Under the experimental conditions, the particle size of the raw materials is large, the reaction temperature is low, but the X ray can detect a large number of β-Sialon.
The decomposition and volatilization of the oxides cause the lattices of the mullite and Al2O3 in the bauxite phase to be activated, then the decomposition and refinement phenomena occur in the large crystal grain aggregate and the activity increases, so as to make the silicon nitride, corundum and mullite be able to contact fully.
Therefore, a large number of fine columnar Sialon phase can be seen in the specimen 4.
At the same time, the bauxite refractory materials contain a large number of low melting point oxide impurities (TiO2, Fe2O3, K2O, Na2O, etc.).
Online since: October 2015
Authors: Li Zhi Gu
Saw blade structure diagram
Fig.2 Series of diamond circular saw blade
As shown in fig.2, the number of 1 is for the disc with the continuous working band.
The number of 2 is the disc with the discontinuous working band.
For the two kinds above, cooling-dissipating heat gaps are evenly distributed, and the angle between the two adjacent cooling-dissipating heat gaps is 360/Z, where Z stands for the gap number.
The number of 3 is for the disc with discontinuous working band, cooling-dissipating heat gaps uneven distributed, and circular distribution of 6 segments.
Step 4: Forming Ingredients and mixing According to the recipe ingredients, put the metal powder and diamond grains in the mixer mechanical stir to mix well.
The number of 2 is the disc with the discontinuous working band.
For the two kinds above, cooling-dissipating heat gaps are evenly distributed, and the angle between the two adjacent cooling-dissipating heat gaps is 360/Z, where Z stands for the gap number.
The number of 3 is for the disc with discontinuous working band, cooling-dissipating heat gaps uneven distributed, and circular distribution of 6 segments.
Step 4: Forming Ingredients and mixing According to the recipe ingredients, put the metal powder and diamond grains in the mixer mechanical stir to mix well.
Online since: August 2013
Authors: Bing Xia Lin, Ming Guo Deng, Xu Wen Liang
Crystal particle often contains a large number of droplet-like chalcopyrite minerais and constitutes a solid solution separation structure, which reflects the issue of chalcopyrite and sphalerite is formed at the same time, and evidences that the ore-forming fluid had experienced the high temperature in the mineralization stage.
Galena, as the main metal mineral, galena and sphalerite in the ore formed basically in the same period, a small number formed in the sedimentary diagenetic period, a large number formed in hydrothermal reformation metallogenic period, gray hypidiomorphic granular particle size is 0.005-1.2 mm.
Magnetite crushes and produces a large number of cracks, wrapped and distributed in colloidal pyrite and pyrrhotite, occurs as dissemination.
Pyrite type half since-idiomorph and granular distribution in the surrounding rock structure, form structure and grain sphalerite early fine disseminated cement gangue mineral.
Galena, as the main metal mineral, galena and sphalerite in the ore formed basically in the same period, a small number formed in the sedimentary diagenetic period, a large number formed in hydrothermal reformation metallogenic period, gray hypidiomorphic granular particle size is 0.005-1.2 mm.
Magnetite crushes and produces a large number of cracks, wrapped and distributed in colloidal pyrite and pyrrhotite, occurs as dissemination.
Pyrite type half since-idiomorph and granular distribution in the surrounding rock structure, form structure and grain sphalerite early fine disseminated cement gangue mineral.
Online since: March 2009
Authors: Cui E Wen, Peter Hodgson, Jian Yu Xiong, Yun Cang Li, C.S. Wong
Sol-gel process is one of the most promising
methods, which has the benefit of phase and structure homogeneity due to atomic level mixing; finer
grain microstructure and lower temperature of crystallization.
Colorimetric analysis and comparison to a standard curve of known viable cell numbers can be used to calculate viable cell numbers for each condition.
A number of cracks distributed on the TiO2 and HA coatings.
In the present study, MTT assay was performed on Ti plates with different film-coatings to quantitatively determine the number of viable cells which have attached on the plate surfaces after incubation for 7 d.
Colorimetric analysis and comparison to a standard curve of known viable cell numbers can be used to calculate viable cell numbers for each condition.
A number of cracks distributed on the TiO2 and HA coatings.
In the present study, MTT assay was performed on Ti plates with different film-coatings to quantitatively determine the number of viable cells which have attached on the plate surfaces after incubation for 7 d.
Online since: January 2011
Authors: Jie Hui Jing, Yu Dong Huang, Zai Xing Jiang, Bo Jiang, Li Liu
C/c composites have been widely used in a number of demanding fields such as space, defense, turbine blades, etc[1-2].
Specimens were polished using diamond polishing slurries with grain sizes from 6 down to 0.50μm.
The curves of the number of 1, 2, 3 and 4 in Fig.4 were one-to-one correspondence of the number of four pushed-out bundles in Fig.5(1-4) respectively, it revealed the loading change process of bundle/matrix interface and the results of loaded interface fracture.
Images in Fig.5(1 and 3) showed high roughness degree on their bundle surfaces and a number of fractured fragments, which were composed of comparatively large matrix debris remained on bundles surface.
Specimens were polished using diamond polishing slurries with grain sizes from 6 down to 0.50μm.
The curves of the number of 1, 2, 3 and 4 in Fig.4 were one-to-one correspondence of the number of four pushed-out bundles in Fig.5(1-4) respectively, it revealed the loading change process of bundle/matrix interface and the results of loaded interface fracture.
Images in Fig.5(1 and 3) showed high roughness degree on their bundle surfaces and a number of fractured fragments, which were composed of comparatively large matrix debris remained on bundles surface.
Online since: April 2012
Authors: Yu Hua Zhang, Min Li Zheng, Yong Zhong Wang
In the actual production, all sorts of types, varieties and specifications of the standard and non-standard tools coexist, the number of tools are huge, and its component also very complex.
According to the characteristics and classification of cutting tool, cutting tool will coded in the following solutions:1 ID, 2 Tool number, 3 Tool name, 4 Tool type, 5 Tool material, 6 Tool length,7 Tool diameter, 8 Tool series, 9 Tool geometrical parameters, 10 Tool manufacturer, 11, Extended length of Tool, 12 Tool number, 13 Tool number, 14, Workpiece materials, 15 The state of tool heat treatment, 16The hardness of tool and other information.
There are some choosing rules in different machining accuracy of part machining materials in Table 2 Table 2 Determination of cutting tool material Workpiece material Machining accuracy Cutter material Steel Steel Steel Cast iron Cast iron Cast iron Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Quenched steel High temperature alloy Rough Semi finish Finish Rough Semi finish Finish Rough Semi finish Finish Semi finish Finish Semi finish, finish Semi finish Hard alloy Coated carbides Hard alloy Hard alloy Yankees Si3N4 ceramics Hard alloy Hard alloy Super fine grain hard alloy Coated carbides Coated carbides Coated carbides PCBN Al2kO3 and ceramics SiCw ceramic Determination of tools series.
According to the characteristics and classification of cutting tool, cutting tool will coded in the following solutions:1 ID, 2 Tool number, 3 Tool name, 4 Tool type, 5 Tool material, 6 Tool length,7 Tool diameter, 8 Tool series, 9 Tool geometrical parameters, 10 Tool manufacturer, 11, Extended length of Tool, 12 Tool number, 13 Tool number, 14, Workpiece materials, 15 The state of tool heat treatment, 16The hardness of tool and other information.
There are some choosing rules in different machining accuracy of part machining materials in Table 2 Table 2 Determination of cutting tool material Workpiece material Machining accuracy Cutter material Steel Steel Steel Cast iron Cast iron Cast iron Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Quenched steel High temperature alloy Rough Semi finish Finish Rough Semi finish Finish Rough Semi finish Finish Semi finish Finish Semi finish, finish Semi finish Hard alloy Coated carbides Hard alloy Hard alloy Yankees Si3N4 ceramics Hard alloy Hard alloy Super fine grain hard alloy Coated carbides Coated carbides Coated carbides PCBN Al2kO3 and ceramics SiCw ceramic Determination of tools series.
Online since: July 2013
Authors: Xue Feng Yu, Ning Jiang, Li Li Chu
Heilongjiang Reclamation area is the largest, the highest level of mechanization of state-owned farm economic region, is our country’s important commodity grain production bases of agricultural and sideline products processing base.
Access (A) subprime indexes mainly include reservoir numbers, irrigation and drainage capacity and farmland irrigation rate.
Capacity(C) subprime indexes mainly include GDP per capita, education level (including every ten thousand people with the number of college students), urban consumption level, and rural consumption level.
Capacity value (C) has emerged a reducing trend in the 10 years, mainly with the development of social economy, GDP per capita and every ten thousand people with the number of college students, etc are in growth every year, and the reduction of Engel coefficient results in C value increasing.
WPI index simple and clear, a number can represent the water security in an area.
Access (A) subprime indexes mainly include reservoir numbers, irrigation and drainage capacity and farmland irrigation rate.
Capacity(C) subprime indexes mainly include GDP per capita, education level (including every ten thousand people with the number of college students), urban consumption level, and rural consumption level.
Capacity value (C) has emerged a reducing trend in the 10 years, mainly with the development of social economy, GDP per capita and every ten thousand people with the number of college students, etc are in growth every year, and the reduction of Engel coefficient results in C value increasing.
WPI index simple and clear, a number can represent the water security in an area.
Online since: April 2023
Authors: B.K. Barakhtin, S.N. Perevislov, A.S. Zhukov, V.V. Madin, P.A. Kuznetcov
The texture of dampers samples represents a non-uniform supplement structure of crushed grains, separated by layers with dispersoids of crystallization of varying completion stages.
Vx=B ∙sinn∙π∙xL (1) Here B is an indefinite amplitude of the deflection, x is coordinate, n is the harmonic number.
Vx=B ∙sinn∙π∙xL (1) Here B is an indefinite amplitude of the deflection, x is coordinate, n is the harmonic number.
Online since: October 2010
Authors: Qiu Sun Ye
We know, all information data are directly or
indirectly processed in expressing of numbers, the numbers in computer are a kind of Fixed
Carrying Numbers(FCN) that, its Fixed Carrying Rules(FCR) as follows: "Plus 2 as 1, borrow/lend
1 as 2",we call it Binary numbers, its Figures' Module(FM) is equal to 2.
Besides this, when FM=8, it is called Octonal numbers (Q); when FM=10, it is called Decimal numbers (D); when FM=16, it is called Hexadecimal numbers (H), etc.
But the Decimal numbers has been used for 1500 years in all over the world; it holds dominator of using numbers since the 6th century [2] A.D.
For example, we can transfer decimal number 255 and 21.625 into FCN such as Hexadecimal numbers(H), Octonal numbers(Q), Binary numbers(B), 5-Carrying numbers(two figures integer 41, two recurring figures of fractions 30), 6-Carrying numbers, and VCN such as 5-Figures(includes two figures integer 70, three figures fraction 343), namely, 21.625 15. 25.5 10101.101 AH Q B = = = = 5(41.3 0) • • = 6(33.343) = 8,3.6,6,6 (70.343) =… 11111111B=377Q=255D=FFH=(17F)10,8,16=(1771)2,8,8,2=(73)36=(43)63=(30)85=(10)255= When there is an irrecurring/recurring figures in the expression/computation, it means that a perturbation motion to be appearance.
Computer Aided Design & Grain Figures System, Computer Applications & Software, 1993(6) [13] Liang Youdong, Shi Jiaoying, Peng Qunsheng translated, Algorithm Basis of Computer Graphics[USA], Science Press of China, 1989(12)
Besides this, when FM=8, it is called Octonal numbers (Q); when FM=10, it is called Decimal numbers (D); when FM=16, it is called Hexadecimal numbers (H), etc.
But the Decimal numbers has been used for 1500 years in all over the world; it holds dominator of using numbers since the 6th century [2] A.D.
For example, we can transfer decimal number 255 and 21.625 into FCN such as Hexadecimal numbers(H), Octonal numbers(Q), Binary numbers(B), 5-Carrying numbers(two figures integer 41, two recurring figures of fractions 30), 6-Carrying numbers, and VCN such as 5-Figures(includes two figures integer 70, three figures fraction 343), namely, 21.625 15. 25.5 10101.101 AH Q B = = = = 5(41.3 0) • • = 6(33.343) = 8,3.6,6,6 (70.343) =… 11111111B=377Q=255D=FFH=(17F)10,8,16=(1771)2,8,8,2=(73)36=(43)63=(30)85=(10)255= When there is an irrecurring/recurring figures in the expression/computation, it means that a perturbation motion to be appearance.
Computer Aided Design & Grain Figures System, Computer Applications & Software, 1993(6) [13] Liang Youdong, Shi Jiaoying, Peng Qunsheng translated, Algorithm Basis of Computer Graphics[USA], Science Press of China, 1989(12)
Online since: November 2024
Authors: Cristan Ghera, Lavinia Madalina Micu, Daniel Ostoia, Cornelia Laura Salcianu, Alexandru Nicolae Luca, Ilare Bordeasu
., compounds on which the resistance to cavitation stresses depends, because they contribute to the decrease of the strength of the structure by weakening the bonds between the basic grains and by creating crack primers.
It can be seen that in alloys 5083 and 6082 the number and sizes of intermetallic compounds are greater than in alloys 2017 A and 7075.
The highest degree of destruction, with rapid evolution and large, deep caverns, is found in alloy 6082 (with deep caverns), followed by alloy 5083 with a large number of small, extensive caverns.
- alloy 2017A can be characterised as having good resistance to vibratory cavitational stresses, with a small number of concentric circles of cavities, which become visible after 90 minutes of stress.
Craciunescu: Cavitation Erosion Mechanisms of Solution Treated X5CrNi18-10 Stainless Steels, Journal of Tribology-Transactions of the Asme, vo. 138, no. 3, Article Number 031102, (2016) [11] L.M.
It can be seen that in alloys 5083 and 6082 the number and sizes of intermetallic compounds are greater than in alloys 2017 A and 7075.
The highest degree of destruction, with rapid evolution and large, deep caverns, is found in alloy 6082 (with deep caverns), followed by alloy 5083 with a large number of small, extensive caverns.
- alloy 2017A can be characterised as having good resistance to vibratory cavitational stresses, with a small number of concentric circles of cavities, which become visible after 90 minutes of stress.
Craciunescu: Cavitation Erosion Mechanisms of Solution Treated X5CrNi18-10 Stainless Steels, Journal of Tribology-Transactions of the Asme, vo. 138, no. 3, Article Number 031102, (2016) [11] L.M.