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Online since: March 2017
Authors: Zainal Arifin Ahmad, Mohamad Najmi Masri, Muhammad Azwadi Sulaiman, Mohd Fadzil Ain, Saniah Abdul Karim
The major peaks are matched with CCTO with ICDD file ref number 01-075-2188.
Ain, Investigation of Grain Size Effect on the Impedance of CaCu3Ti4O12 from 100 Hz to 1 GHz of Frequency, Adv.
Ain, Investigation of Grain Size Effect on the Impedance of CaCu3Ti4O12 from 100 Hz to 1 GHz of Frequency, Adv.
Online since: July 2007
Authors: Sophie Starke, Manfred Felix, M. Katzschner, Sabine Willscher
The dump
material is mainly fine grained due to former coal washing processes, and has an enhanced water
permeability.
In particular, the drainage ditch contained large numbers of iron- and sulfate-reducers.
In particular, the drainage ditch contained large numbers of iron- and sulfate-reducers.
Online since: July 2011
Authors: Sukanda Jiansirisomboon, Anucha Watcharapasorn, Suwapitcha Buntham, Panupong Jaiban, Ampika Rachakom
Space group number is 62 (Pnma) and its lattice parameters are a = 5.7742, b = 8.1443, c = 5.7037, a = 90o, b = 90o and g = 90o.
It was found that this powder morphology seemed to have 2 characteristics containing equiaxed and plate-shaped grains.
It was found that this powder morphology seemed to have 2 characteristics containing equiaxed and plate-shaped grains.
Online since: January 2012
Authors: Ming Chen, Qing Long An, Guo Giang Guo, Zhi Qiang Liu
A number of key factors contribute to these results including: 15% higher strength of TC11 over TC4, the much higher ductility of TC11, especially TC11 has superior heat intensity properties when below 500℃ [3].
It was found in Fig. 4(b) that a thick disturbed or plastically deformed layer was formed underneath the ground surface, the grains had been elongated along grinding direction.
It was found in Fig. 4(b) that a thick disturbed or plastically deformed layer was formed underneath the ground surface, the grains had been elongated along grinding direction.
Online since: February 2018
Authors: Banbhalang Swer
The Master plan has been prepared taking into consideration the increase in the number of people participating in the annual pilgrimage to the hillock Lum ‘Sohpetbneng’.
The Platform for Sanctified Rice.After the ceremony from the KaDuwan, "the altar, people move to collect the sanctified rice grain from an area located at a lower level from the KaDuwan, "the altar.
The Platform for Sanctified Rice.After the ceremony from the KaDuwan, "the altar, people move to collect the sanctified rice grain from an area located at a lower level from the KaDuwan, "the altar.
Online since: February 2013
Authors: Xun Wang, Lei Zhu, Hong Jiao Song
Through a large number of orthogonal experiments, the optimal calcination temperature is 500 ℃, and the calcination time is 2h; then change the doping amount of Ce3+ or Fe3+, temperature and the calcination time to do the orthogonal experiment again.
Analysis of SEM's characterization (a) 1:200, 000 (pure TiO2) (b) 1:2, 000, 000(Ce/TiO2) (c) 1:2, 000, 000 (Fe/TiO2) Fig.2 SEM pictures of nano-TiO2 under different conditions Fig.2Picture (a) shows that, at 500℃, pure TiO2 has appeared reunion phenomenon while its lattices are good; in Fig2picture (b), TiO2 doped with Ce shows a majority of crystal grains whose sizes are within the range of 10-30nm, and has relatively complete lattices, while at 550˚C, there are a few comparatively large reunion particles, the overall dispersion effect is relatively good, relatively playing its photocatalytic activity.
Analysis of SEM's characterization (a) 1:200, 000 (pure TiO2) (b) 1:2, 000, 000(Ce/TiO2) (c) 1:2, 000, 000 (Fe/TiO2) Fig.2 SEM pictures of nano-TiO2 under different conditions Fig.2Picture (a) shows that, at 500℃, pure TiO2 has appeared reunion phenomenon while its lattices are good; in Fig2picture (b), TiO2 doped with Ce shows a majority of crystal grains whose sizes are within the range of 10-30nm, and has relatively complete lattices, while at 550˚C, there are a few comparatively large reunion particles, the overall dispersion effect is relatively good, relatively playing its photocatalytic activity.
Online since: November 2019
Authors: Dmitriy V. Kraynev, Evgeniy M. Frolov, Pavel A. Norchenko
Though heat-resistant and stainless steels differ from each other, they have a number of common physical and mechanical properties that determine their common technological properties with respect to machinability by cutting.
problems in cutting stainless and heat-resistant steels are determined by the following factors: - high hardening of the material during the cutting force deflection considering specifics of the lattice structure; - low thermal conductivity of the material machined, which causes an elevated temperature in the contact zone and activation of adhesion and diffusion phenomena; - the ability to maintain the initial strength and hardness at elevated temperatures, which leads to high specific loads on the contact surfaces of a part with a cutting tool; - great abrasive capacity of high-temperature and stainless steels induced by the presence of a second phase (except for a solid solution) forming inclusions of intermetallic compounds; - reduced vibration resistance of the cutting motion caused by increased hardening of stainless and heat-resistant materials at uneven flow of their plastic deformation; - low surface quality due to increased plasticity of hard-to-work materials; - considerable grain
problems in cutting stainless and heat-resistant steels are determined by the following factors: - high hardening of the material during the cutting force deflection considering specifics of the lattice structure; - low thermal conductivity of the material machined, which causes an elevated temperature in the contact zone and activation of adhesion and diffusion phenomena; - the ability to maintain the initial strength and hardness at elevated temperatures, which leads to high specific loads on the contact surfaces of a part with a cutting tool; - great abrasive capacity of high-temperature and stainless steels induced by the presence of a second phase (except for a solid solution) forming inclusions of intermetallic compounds; - reduced vibration resistance of the cutting motion caused by increased hardening of stainless and heat-resistant materials at uneven flow of their plastic deformation; - low surface quality due to increased plasticity of hard-to-work materials; - considerable grain
Online since: January 2015
Authors: Marta Krawczyk, Pawel Figiel, Witold Biedunkiewicz, Anna Biedunkiewicz, Grzesiak Dariusz, Anna Stasiukiewicz
Unlike the conventional material-removal processing method, SLM is based on material incremental manufacturing (MIM) and has a number of advantages such as net-shape fabrication without the requirement of molds or dies, a high level of process flexibility, and a wide range of applicable materials [7].
The results of the investigation suggest that TiC is formed through a dissolution/precipitation mechanism by means of the heterogeneous nucleation of TiC and subsequent grain growth. 5µm 20µm Fig. 2.
The results of the investigation suggest that TiC is formed through a dissolution/precipitation mechanism by means of the heterogeneous nucleation of TiC and subsequent grain growth. 5µm 20µm Fig. 2.
Online since: December 2016
Authors: Karel Slámečka, Jiří Švejcar, Ladislav Čelko, Lenka Klakurková, David Jech, Miroslava Horynová
Results and discussion
The atmospheric plasma sprayed conventional ZrO2+Y2O3 – CoNiCrAlY thermal barrier coating system of the sample 1 shows a typical structure composed of pores and of considerable number of microcracks, especially at interfaces of individual splats [4].
Suspension plasma sprayed ceramic YSZ top coat (44 µm thick) of the sample 3 is characterized by nanometric to submicrometric size of pores and the microstructure is composed from very fine grains.
Suspension plasma sprayed ceramic YSZ top coat (44 µm thick) of the sample 3 is characterized by nanometric to submicrometric size of pores and the microstructure is composed from very fine grains.
Online since: September 2021
Authors: Elena M. Gotlib, Dilyara F. Sadykova, Elena V. Perushkina, Alla G. Sokolova
On the contrary, the toxicity of QAC is inversely proportional to the length of the carbon chain; it decreases as the number of carbon atoms in the radical increases [6].
Wollastonite of the Mivoll 10-97 brand (TU 577-006-40705684-2003) with a characteristic length-to-grain ratio of 15: 1 was used as a modifier [8].
Wollastonite of the Mivoll 10-97 brand (TU 577-006-40705684-2003) with a characteristic length-to-grain ratio of 15: 1 was used as a modifier [8].