Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: February 2022
Authors: Darya G. Chkalova, Ruslan V. Chkalov
Introduction
Titanium carbide (TiC) is a material with a number of unique properties: high melting point (about 3000 degrees), high hardness (9-9.5 on the Mohs scale), low electrical resistance, high thermal conductivity, chemical inertness, resistance to aggressive media and abrasive wear, bio- and hemocompatibility of the material [1-3].
This method significantly surpasses traditional approaches in terms of the resulting coating quality, an absence of the need for lengthy preparatory work and a large number of technological operations.
As seen from Fig. 6 and Fig. 7, the surface structure may differ in the grain size of the coating.
This method significantly surpasses traditional approaches in terms of the resulting coating quality, an absence of the need for lengthy preparatory work and a large number of technological operations.
As seen from Fig. 6 and Fig. 7, the surface structure may differ in the grain size of the coating.
Online since: August 2010
Authors: Sung Lin Tsai, Fuang Yuan Huang, Yao Ching Tsai, Biing Hua Yan
Commercially available polishing pads with
grits number atop #4000 are very rare as the finer the grits the harder to spread them evenly on pad
surface.
Kim [2] tackled the problem of high production costs of CMP pad with hydrophilic polymer grains.
The Taguchi method is not only able to get the desired results with least cost and number of experiment runs but also able to find out relative importance among all the factors.
Kim [2] tackled the problem of high production costs of CMP pad with hydrophilic polymer grains.
The Taguchi method is not only able to get the desired results with least cost and number of experiment runs but also able to find out relative importance among all the factors.
Online since: March 2004
Authors: Seung Boo Jung, Chang Bae Lee, Jeong Won Yoon
Further aging resulted in coarsening of the grain structure in the
solder matrix.
Due to the Journal Title and Volume Number (to be inserted by the publisher) Solder (Cu,Ni)6Sn5 Ni-P deposit Cu (a) (b) (c) P-rich Ni layer Solder (Cu,Ni)6Sn5 Ni-P deposit Cu (a) (b) (c) P-rich Ni layer Fig. 1 SEM micrographs of the interface between Sn-Ag-Cu solder and electroless Ni-P/Cu substrate; (a) as-reflowed, (b) after aging at 150 � for 30days and (c) 100days.
Vol. 31 (2002), p. 584 Journal Title and Volume Number (to be inserted by the publisher) [7] J.W.
Due to the Journal Title and Volume Number (to be inserted by the publisher) Solder (Cu,Ni)6Sn5 Ni-P deposit Cu (a) (b) (c) P-rich Ni layer Solder (Cu,Ni)6Sn5 Ni-P deposit Cu (a) (b) (c) P-rich Ni layer Fig. 1 SEM micrographs of the interface between Sn-Ag-Cu solder and electroless Ni-P/Cu substrate; (a) as-reflowed, (b) after aging at 150 � for 30days and (c) 100days.
Vol. 31 (2002), p. 584 Journal Title and Volume Number (to be inserted by the publisher) [7] J.W.
Online since: March 2007
Authors: Yu Zhou, Hua Ke, De Chang Jia, Wen Wang
E
aN an
p 2
2
δ
σ −=
(1)
where σp is compressive stress, n the number of unit cell layer which perform surface bond contraction
(n<=3), N the total number of unit cell layers along the radius direction of a spherical grain, a the
lattice constant, δa/a (10% in present study) the ratio of surface bond contraction, and E the Young's
module (the values reported by Yan et al [14]).
Online since: November 2012
Authors: Deng Xu, Ji Jie Ma, Guang Ming Cheng, Lin Lin Wang, Ning Li
The test solution of the filter paper immerse was posted at room temperature for 10 min, then check the blue brown spots number of the filter per unit area.
H=n/s Where H-coating porosity, n-the pore spots number, s-measured coating area, cm2 Results and discussions The influence of the amount of PTFE oh the coating porosity Fig. 1 The deposits porosity with different adding amount of PTFE Whole (n/cm2) Figure 1 shows the porosity changes with different PTFE content in composite coating process.
At the same time, the coating surface grind grain amount decrease, and the surface become smooth.
H=n/s Where H-coating porosity, n-the pore spots number, s-measured coating area, cm2 Results and discussions The influence of the amount of PTFE oh the coating porosity Fig. 1 The deposits porosity with different adding amount of PTFE Whole (n/cm2) Figure 1 shows the porosity changes with different PTFE content in composite coating process.
At the same time, the coating surface grind grain amount decrease, and the surface become smooth.
Online since: December 2010
Authors: Boris A. Gizhevskii, A.A. Makhnev, L.V. Nomerovannaya, Sergey V. Naumov, Natalia V. Kostromitina
High-density nanostructured CuO samples were prepared from coarse-grain powder of CuO by two methods: shock wave loading (SWL) – (S1) and (S2) samples and high pressure torsion (HPT) – (S3) and (S4) samples [12].
Here, the optical functions spectra also shown for the nanostructured CuO sample (S1) prepared by SWL method (figures above the curves indicate the number of samples).
Spectra of the (a) real e1(E) and (b) imaginary e2(E) parts of e(E) for nanostructured CuO samples; the inset shows the absorption coefficient K; number 2, 3, and 4 correspond to samples (S2), (S3), and (S4).
Here, the optical functions spectra also shown for the nanostructured CuO sample (S1) prepared by SWL method (figures above the curves indicate the number of samples).
Spectra of the (a) real e1(E) and (b) imaginary e2(E) parts of e(E) for nanostructured CuO samples; the inset shows the absorption coefficient K; number 2, 3, and 4 correspond to samples (S2), (S3), and (S4).
Online since: July 2016
Authors: Cheng Jun Liu, Yi Xia Zhang, Chun Hui Yang
For the former method, Voronoi tessellation method, cellular automata grain growth algorithm, sphere growth algorithm, and image analysis methods could be applied to create a representative structure in a digital material representation sense as indicated by Yang et al. [7, 8].
As octadecahedral foams can be accounted as a number of repeated RVEs in the structure, this RVE is considered to represent aluminium foams with uniform and closed octadecahedron cells.
Parts 1 and 2 in the FE model were meshed using the Belytschko-Tsay shell elements, with setting a shear factor of 5/6, and the number of through shell thickness integration points to 1.
As octadecahedral foams can be accounted as a number of repeated RVEs in the structure, this RVE is considered to represent aluminium foams with uniform and closed octadecahedron cells.
Parts 1 and 2 in the FE model were meshed using the Belytschko-Tsay shell elements, with setting a shear factor of 5/6, and the number of through shell thickness integration points to 1.
Online since: July 2017
Authors: Bartolomeo Pantò, Stefano de Santis, Marialaura Malena, Gianmarco de Felice
The number of contributions offered toward the comprehension of the mechanical behaviour of curved substrates is small, even though in current practice an increasing number of structural elements like arches or vaults are strengthened with external bonded composites.
Its compressive strength, Elastic Modulus, tensile strength and grain size range, are equal to 20.6 N/mm2, 11.42 KN/mm2, 5.42 N/mm2 and 0-1.4 mm, respectively The bond tests have been performed on masonry specimens consisting of ten bricks and nine mortar joints for a whole height of 650 mm.
Its compressive strength, Elastic Modulus, tensile strength and grain size range, are equal to 20.6 N/mm2, 11.42 KN/mm2, 5.42 N/mm2 and 0-1.4 mm, respectively The bond tests have been performed on masonry specimens consisting of ten bricks and nine mortar joints for a whole height of 650 mm.
Online since: March 2015
Authors: Hai Chao Wang, Xi Quan Xu, Zhi Gang Yang, Hua Jie Zhang, Chen Chen, Chun He Zhao
Table 2 Compatibility of cement A and admixture
Experiment number
Factor A
Factor B
Factor C
Factor D
Factor E
Initial
Net paste
(1h)
Net paste
(2h)
1
1
1
1
1
1
240
280
270
2
1
2
2
2
2
265
290
260
3
1
3
3
3
3
240
280
280
4
1
4
4
4
4
165
185
175
5
2
1
2
3
4
310
305
300
6
2
2
1
4
3
260
280
270
7
2
3
4
1
2
230
240
210
8
2
4
3
2
1
220
320
310
9
3
1
3
4
2
270
295
290
10
3
2
4
3
1
260
290
270
11
3
3
1
2
4
200
220
200
12
3
4
2
1
3
180
190
170
13
4
1
4
2
3
290
290
235
14
4
2
3
1
4
250
265
225
15
4
3
2
4
1
215
235
215
16
4
4
1
3
2
220
210
160
T11
Initial
910.00
1110.00
920.00
900.00
935.00
Test of fluidity of cement slurry
Net paste(1h)
1035.00
1170.00
990.00
975.00
1125.00
Net paste(2h)
985.00
1095.00
900.00
875.00
1065.00
T22
Initial
1020.00
1035.00
970.00
975.00
985.00
Net paste(1h)
1145.00
1125.00
1020.00
1120.00
1035.00
Net paste(2h)
1090.00
1025.00
945.00
955.00 T44 Initial 975.00 785.00 945.00 910.00 925.00 Net paste(1h) 1000.00 905.00 1005.00 995.00 975.00 Net paste(2h) 835.00 815.00 890.00 950.00 900.00 1 Initial 227.50 277.50 230.00 225.00 233.75 Net paste(1h) 258.75 292.50 247.50 243.75 281.25 Net paste(2h) 246.25 273.75 225.00 218.75 266.25 2 Initial 255.00 258.75 242.50 243.75 246.25 Net paste(1h) 286.25 281.25 255.00 280.00 258.75 Net paste(2h) 272.50 256.25 236.25 251.25 230.00 3 Initial 227.50 221.25 245.00 257.50 242.50 Net paste(1h) 248.75 243.75 290.00 271.25 260.00 Net paste(2h) 232.50 226.25 276.25 252.50 238.75 4 Initial 243.75 196.25 236.25 227.50 231.25 Net paste(1h) 250.00 226.25 251.25 248.75 243.75 Net paste(2h) 208.75 203.75 222.50 237.50 225.00 range Rj(Initial) 27.50 81.25 15.00 32.50 15.00 Rj(1h) 37.50 66.25 42.50 36.25 37.50 Rj(2h) 63.75 70.00 53.75 33.75 41.25 Table 3 Compatibility of cement B and admixture Experiment number
In spite of what has been said done, components of cement, varieties and properties of auxiliary materials, shapes of particles and grain composition cannot be ignored.
955.00 T44 Initial 975.00 785.00 945.00 910.00 925.00 Net paste(1h) 1000.00 905.00 1005.00 995.00 975.00 Net paste(2h) 835.00 815.00 890.00 950.00 900.00 1 Initial 227.50 277.50 230.00 225.00 233.75 Net paste(1h) 258.75 292.50 247.50 243.75 281.25 Net paste(2h) 246.25 273.75 225.00 218.75 266.25 2 Initial 255.00 258.75 242.50 243.75 246.25 Net paste(1h) 286.25 281.25 255.00 280.00 258.75 Net paste(2h) 272.50 256.25 236.25 251.25 230.00 3 Initial 227.50 221.25 245.00 257.50 242.50 Net paste(1h) 248.75 243.75 290.00 271.25 260.00 Net paste(2h) 232.50 226.25 276.25 252.50 238.75 4 Initial 243.75 196.25 236.25 227.50 231.25 Net paste(1h) 250.00 226.25 251.25 248.75 243.75 Net paste(2h) 208.75 203.75 222.50 237.50 225.00 range Rj(Initial) 27.50 81.25 15.00 32.50 15.00 Rj(1h) 37.50 66.25 42.50 36.25 37.50 Rj(2h) 63.75 70.00 53.75 33.75 41.25 Table 3 Compatibility of cement B and admixture Experiment number
In spite of what has been said done, components of cement, varieties and properties of auxiliary materials, shapes of particles and grain composition cannot be ignored.
Online since: August 2007
Authors: Marta Tańcula, V Kochnev, E. Fokina, Malgorzata Sopicka-Lizer, Tomasz Pawlik
Introduction
Sialon ceramic could be obtained by a number of routes, including sintering of carbothermally
derived powders or direct solid-state reaction of nitrides and oxides in nitrogen atmosphere.
Zirconia particles consisted of the numerous numbers of tiny nanocrystallites, some extremely fragmented particles showed amorphous structure and were not identified by the electron diffraction pattern.
It is concluded that significant destruction of crystalline lattice took place, with the formation of the new grain boundaries and/or dislocations, however, various susceptibilities of the mixture component to deformation were found.
Zirconia particles consisted of the numerous numbers of tiny nanocrystallites, some extremely fragmented particles showed amorphous structure and were not identified by the electron diffraction pattern.
It is concluded that significant destruction of crystalline lattice took place, with the formation of the new grain boundaries and/or dislocations, however, various susceptibilities of the mixture component to deformation were found.