Quasi-two dimensional model calculations show the possibility to realize a cw atomic nitrogen laser, pumped by the recombination process in rapidly expanded plasma flows. Sufficient gain for lasing is demonstrated for stagnation conditions of 13 000 ,< To< 24 000 K and 2 < po6 30 kPa. Location and size of the gain regimes in the flow direction depend on the plasma starting condition. At a wavel...

Rhenium, gold and platinum film micropatterns were obtained by the LCVD method on the surface of silicon and glass substrates from vapors of R ~ z ( C O ) ~ ~ , (CHg)~Au(dpni), P t ( l~fa)~, respectively. The heated reaction chamber at atmospheric pressure with a flow of an inert gas-carrier was used. The high marginal sharpness and the thickness uniformity of deposited films was provided by th...

We report the role of ultrasonic shot-peening (SP) and laser-shock peening (LSP) on insertion atmospheric nitrogen during high temperature oxidation pure titanium improvement its resistance. Ion Beam analysis showed that for short durations, a layer Ti2N is formed at oxide-metal interface. However, only LSP treatment leads to formation long-term stable nitrogen-rich which acts as barrier diffus...

Large-scale plasma produced in nitrogen gas at room temperature and pressures ranging from 4 × 103 to 1.2 × 105 Pa by high-power laserinduced dielectric breakdown (LIDB) has been investigated. Time-integrated optical nitrogen gas spectra excited from a CO2 laser have been measured and analysed. The spectrum of the generated plasma is dominated by the emission of strong N+ and N and very weak N2...

Magnaporthe oryzae is an important model system in studies of plant pathogenic fungi, and nitrogen is a key nutrient source affecting microbial growth and development. In order to understand how nitrogen stress causes changes in mycelial proteins, we analyzed differentially expressed mycelial proteins from the M. oryzae virulent strain CH-63 using two-dimensional electrophoresis and mass spectr...

Self-assembled GaInNAs quantum dots (QDs) were grown on GaAs (001) substrate using solidsource molecular-beam epitaxy (SSMBE) equipped with a radio-frequency nitrogen plasma source. The GaInNAs QD growth characteristics were extensively investigated using atomic-force microscopy (AFM), photoluminescence (PL), and transmission electron microscopy (TEM) measurements. Self-assembled GaInNAs/GaAsN ...

The slurry erosion behaviour of laser clad Fe–Cr–B–Si alloy coatings was investigated at impact angles from 30u to 90u with an increment of 15u, and compared with the slurry erosion behaviour of two laser clad carbide coatings and a non-coated substrate made of AISI 4140 steel. The Fe–Cr–B–Si alloy coatings had slurry erosion resistance. Their overall slurry erosion resistance at impact angles ...

(72) Inventors: BEKIR SAMI YILBAS, DHAHRAN (57) ABSTRACT (SA); SOHAIL AKHTAR, DHAHRAN (SA); CIHAN KARATAS’ ANKARA The laser nitriding method of making phosphor bronze with (TR); CHRIS CHATWIN’ BRIGHTON surface-embedded titanium carbide particles involves coating (GB) a cleaned phosphor bronze workpiece with a thin ?lm formed (73) Assignee: KING FAHD UNIVERSITY OF of a carbonaceous layer mixed w...