Mostafa Abdallah - Academia.edu (original) (raw)
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Papers by Mostafa Abdallah
Materials & Design, 2009
Fabrication of tungsten-copper net-shapes has become an important issue in recent years due to th... more Fabrication of tungsten-copper net-shapes has become an important issue in recent years due to their unique properties which make them suitable for a wide variety of applications. In this investigation, W-Cu composite powders containing 20 wt.% and 30 wt.% Cu were processed by powder metallurgy technique using two types of prepared powders, namely, Cu-coated tungsten and mixtures of elemental powders. The coating method of tungsten powders was carried out using electroless coating technique. The investigated powders were cold compacted and sintered in vacuum at two sintering temperatures, 1250°C and 1400°C.
Nahrung-food, 1975
The infrared spectrum of the Egyptian lemongrass oil proved that the changes in the samples durin... more The infrared spectrum of the Egyptian lemongrass oil proved that the changes in the samples during storage under different conditions for 4 months at room temperature as well as for the samples stored for 6 months at low temperatures could be detected, specially the changes of the carbonyl groups. In lemongrass oil stored in air for 4 months other bands of the carbonyl groups were noticed at wave number 1600 to 1800 cm−1. The latter results proved that specific chemical reactions play an important role under these storage conditions.
Materials & Design, 2009
Fabrication of tungsten-copper net-shapes has become an important issue in recent years due to th... more Fabrication of tungsten-copper net-shapes has become an important issue in recent years due to their unique properties which make them suitable for a wide variety of applications. In this investigation, W-Cu composite powders containing 20 wt.% and 30 wt.% Cu were processed by powder metallurgy technique using two types of prepared powders, namely, Cu-coated tungsten and mixtures of elemental powders. The coating method of tungsten powders was carried out using electroless coating technique. The investigated powders were cold compacted and sintered in vacuum at two sintering temperatures, 1250°C and 1400°C.
Nahrung-food, 1975
The infrared spectrum of the Egyptian lemongrass oil proved that the changes in the samples durin... more The infrared spectrum of the Egyptian lemongrass oil proved that the changes in the samples during storage under different conditions for 4 months at room temperature as well as for the samples stored for 6 months at low temperatures could be detected, specially the changes of the carbonyl groups. In lemongrass oil stored in air for 4 months other bands of the carbonyl groups were noticed at wave number 1600 to 1800 cm−1. The latter results proved that specific chemical reactions play an important role under these storage conditions.