Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: January 2021
Authors: Shigeo Sato, Yusuke Onuki, Takashi Hirano, Kazuki Umemura, Toshiro Tomida
Even if the high carbon regions are very fine and/or fuzzy domains, but the number is as large as the bainitic laths, the existence can be captured from the statistic viewpoint.
Block-shaped austenite grains are seen.
Online since: May 2020
Authors: Yus Rama Denny, Teguh Firmansyah, Vaka Gustiono, Sang Su Lee
Experiment MgO thin films were deposited on Si (001) substrates by electron beam evaporation using melt grain of MgO target (99.99%).
Furthermore, the change in intensity of the O1s peak component at higher binding energy is related to a change in number of surface hydroxide in the thin films.
Online since: February 2021
Authors: Kadhim Suffer, Munaf S. Majeed, Rabea Q. Nafil, Marwa F. Abdul Jabbar
They studied the influence of annealing temperatures on the grain size and the optical characteristics of nano-ZnO.
The larger numbers of the nanoparticles in front of the laser beam absorb a higher portion of its energy, and fragmentation mechanism can occur on these nanoparticles, which also leads to more reduction in their size.
Online since: August 2008
Authors: Fernando dos Santos Ortega, Claudinei dos Santos, Pedro H.B. Prado
The high powder compaction obtained with this technique promotes a large number of contact points between particles, favoring the activation of diffusion mechanisms during solid-state sintering.
The results presented in Fig. 3 show typical Al2O3 and ZrO2 microstructures with grain size compatible with the starting particle size and sintering temperature used.
Online since: August 2004
Authors: Hugh E. Evans, S. Gray, K. Berriche-Bouhanek
The oxide thicknesses for each specimen were recorded at a number of positions and averaged.
It is clear that the oxide atop the 0% Si alloy is considerably thicker than that on the silicon bearing alloy, which possesses a silica interlayer and grain boundary silica intrusions.
Online since: June 2014
Authors: Xin Shao, Jin Ting Zhao, Zhen Guo Wang, Chuan Yue, Yong Ning Mi
Introduction Superfine sand refers to the fineness modulus of 0.7-1.5, the average particle size is under 0.25 mm, it’s poor grain size distribution, large void ratio, big specific surface area, high silt content.
Table 1 The concrete mixture ratio and compression test result Serial number Water/ cement ratio Cement /(kg/m3) Water/ (kg/m3) Pebble/(kg/m3) Sand /(kg/m3) Sand/gravel ratio /% The compressive strength of 28 days / MPa T-1 0.4 475.00 190 1292.24 454.03 26 33.00 T-2 0.45 422.22 190 1308.35 483.91 27 42.77 T-3 0.5 380.00 190 1316.91 512.13 28 32.97 T-4 0.55 345.45 190 1357.15 501.96 27 30.46 Test method Concrete compressive strength test.Put the concrete in the standard curing room maintenance to 28 days,and then measured compressive strength of concrete block.
Online since: October 2006
Authors: Eui Pak Yoon, Jung Pyung Choi, Young Min Hur, Tae Woon Nam
This study considers the grain primary silicon morphology changing process and eutectic modification process with electromagnetic vibration.
10000 mixed internal stress mixed drag stress turbulent drag stress smooth internal stress 10-1 atm 10-2 atm 10-3 atm 10-4 atm 10-5 atm 1atm 10atm Re=10 Frequency (Hz) Amplitude (m) Re=10 3 102 atm viscous drag stress (a) (b) Fig. 3 (a) The trends of mean diameter and degree of sphericity varies with frequency and intensity of EMV (cooling rate=1.5K/s) (b) f-a map showing bending stresses in roots of aluminum alloy (a) (b) (c) (d) (e) (f) Fig. 4 Microstructures of Al-Si-Mg alloy according to the frequency at 1.05×10 6A /m2 (a) as-cast, (b) 60Hz, (c) 200Hz,(d) 500Hz, (e) 700Hz, (f) 1000Hz It has been well documented that the transformation of unmodified flakes to modified fibrous structures arises from a very different type of growth of the Si phase and this difference appears to lie in the number
Online since: October 2011
Authors: Yun Chen, Ling Jiang, Jia Jun Pan
Introduction Concrete faced rockfill dam (CFRD) [1] is a modern earth-rockfill dam type that artificial grain gradation rockfills are used as main bearing system, concrete slabs are adopted as anti-seepage structure and built in layers by adopting large-tonnage vibro-rolling construction technique.
Dissected elements of 3-D computational grid model for dam body and foundation are 67,336 in total with a total number node of 69,327.
Online since: August 2014
Authors: Masato Enokizono, Takashi Todaka, Kyohei Miyamoto
The arrows indicate the rolling direction of the segmented grain-oriented silicon steel sheets.
Because of limitation of allowed page number, we picked up typical examples: (a) the conventional (0, 100), (b) (0, 70), and (c) (0, 50).
Online since: July 2006
Authors: V. Asanović, Kemal Delijić, Dragan Radonjić
The absence of alloying elements results in a very low level of intermetallic phases and, consequently, reduces the number of pinholes.
Very fine grain structure is formed with the help of intermetallics, making the product very ductile so that high elongation and burst strength values are reached.
Showing 25011 to 25020 of 28673 items