Search results

Ti2AlN ceramic have been prepared by self-propagating high-temperature synthesis method using Ti, Al and TiN mixture as raw materials under different N2 pressures.
The purpose of the present study is to investigate the phase composition and micro-morphology changes during self-propagating high-temperature synthesis of Ti2AlN materials from Ti, Al and TiN powder mixtures in different N2 pressures to get purer Ti2AlN materials.
Titanium (Strem Chemicals, <45um, 99% purity), aluminum (Strem Chemicals, <45um, 99.8% purity), and titanium nitrogen intermetallic compound TiN (prepared by SHS method ourselves) powders were used as the starting materials. 20 wt.% TiN was used as additive in Ti and Al metal powders, with the mole ratio of Ti:Al=2:1.
Summary Ti2AlN ceramic have been prepared by self-propagating high-temperature synthesis method using Ti, Al and TiN mixture as raw materials under different N2 pressures.
El-Raghy, S.

El-Sayed et al. [26] reported synthesis and antimicrobial evaluation of several quinoline and pyrimidoquinoline derivatives.
El-Sayed, E.
El-Sayed, B.A.
Al-Bassam, M.E.
El-Abadelah, F.

Coherency loss of Al3Sc precipitates during ageing of dilute Al-Sc alloys D.
The need for cost reduction due to the high price of scandium has led to the development of dilute Al-Sc alloys.
The particular system exhibits the highest specific hardening as compared to the other commercial Al alloys [1,2].
For the production of the billet, high purity aluminium (99.999%) and an Al-2 wt%Sc master alloy had been used.
Hatherly, Recrystallization and Related Annealing Phenomena (2 nd Ed.), Elsevier (2004) [11] E.L.

To consider exchange and correlation effect to the dielectric function, the local-field correction function proposed by Farid et al is employed in the present study.
For describing the electron-ion interaction we have used the potential proposed by Jivani et al [6-13], which is of the form:
In this study, the exchange-correlation function proposed by Farid et al [14] is employed to study various properties of HgX systems investigated by pseudopotential method.
El Haj Hassan, B.
Al Shafaay, H.

El, % 32,0 34,0 36,0 38,0 40,0 42,0 1 2 3 4 5 r - value 0,85 0,90 0,95 1,00 1,05 1,10 1 2 3 4 5 YS, MPa 0 50 100 150 200 1 2 3 4 5 A B C D E A B C D E A B C D E Fig. 2.
The effect of partial substitution of Ti by Nb on the mechanical properties of hot-rolled IF steel sheets is presented in Fig. 3 for the examples of austenitic rolling regime A and ferritic rolling regime B. 0 50 100 150 200 250 300 350 Ti IF steel Ti+Nb IF steel 0 50 100 150 200 250 300 350 Ti IF steel Ti+Nb IF steel YS, MPa TS, MPa El, % r value * 100 n value * 1000 YS, MPa TS, MPa El, % r value * 100 n value * 1000 Fig. 3.
The skin-pass rolling with 2% reduction resulted in slight increase of yield strength values (∆YS ≈ 20-30 MPa) and, correspondingly, slight decrease of elongation (∆El ≈ 2-4 %).
El, % 32,00 34,00 36,00 38,00 40,00 42,00 1 2 3 4 5 r - value 0,00 0,50 1,00 1,50 2,00 2,50 1 2 3 4 5 YS, MPa 0 50 100 150 200 1 2 3 4 5 A B C D E A B C D E A B C D E Fig. 4.
These are complex precipitates with varying amounts of Ti, Mn, S and N, and sometimes also Al, Si and B.

El-Darwish, M.
Al-Homoud, Performance characteristics and practical applications of common building thermal insulation materials, Build.
El Majd, M.
El-Kammar, H.
El Fadar, Energy, economic and environmental benefits of integrating passive design strategies into buildings: A review, Renew.

El Kadi and Ellyin [6] as well as Justo et al. [7] showed that a slight variation of the test frequency leads to an identical number of failure cycles, therefore the test results were presented in the following evaluations and in the combined result presentations independently of the test frequency.
El Kadi, F.

El-Sayed, M.A.
El-Sayad: Plasmonics Vol. 2 (2007), p. 107−118
[7] A.L.

Therefore, two-dimensional SIMS concentration distributions are used to investigate lateral straggling of Al and P implanted in 4H-SiC.
By experimentally investigating depth profiles, it has been shown that in 4H-SiC channeling along [1120] is most pronounced in the case of Aluminum (Al) [4].
Figure 2 shows two-dimensional Al implantation distributions for medium dose, low energy, room temperature and different channeling directions.
Both Al and P implanted samples show a dependency of lateral straggling on the channel opening.
El-Kareh, Fundamentals of Semiconductor Processing Technologies, Springer, 1995

Effects of Low Frequency Electromagnetic Field on the Solidification Structure of Al-4.5%Cu Alloy during Level Casting Process Xiangjie Wanga, Dandan Chenb, Huixue Jiangc, Gaosong Wangd, Qingfeng Zhue, Jianzhong Cuif, Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, P.R.
The experiment is performed on the Al-4.5% Cu alloy, and the experimental results show that with the application of the low frequency electromagnetic field, the macrostructure and microstructure are changed greatly.
In this research, conventional level casting and LFEC are combined to produce Al-4.5 wt% Cu alloy with a relatively low melting temperature, a high thermal conductivity and a wide solidification range, and experiment casting ingot with the diameter of 200 mm was carried out.
El-Kaddah, J.