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  • 2005-2009  (4)
  • 1
    Electronic Resource
    Electronic Resource
    An Overview of Cold Spray Technique (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 2419-2422 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The Cold spray or cold gas dynamic spraying is the new progressive step in the directionof development of high kinetic energy coating processes. The cold spray is a method for coatingsubstrates under atmospheric conditions. In this process micron sized solid particles are acceleratedand transported to substrates by means of supersonic free jets. Upon impacting the substrates,particles stick to the surface and form coatings which possess very low porosity. The paper outlinesthe principles involved in cold spray method and the equipment used for the technique. The coldspray method is related to classical thermal spray methods but it has some interesting additionalfeatures, which has been discussed in the paper. A fundamental feature of cold spray method i.e.concept of critical velocity along with the plausible mechanism theory responsible for thedeposition of coating has been discussed briefly. Successful applications of cold spray process andits environment friendly aspect has been elaborated. It is reported that well founded cold spraytechnology will be able to compete for a good market share of VPS/PVD coatings in various fieldslike power, electronic/electrical, biotechnology, turbines and other industries. The cold sprayprocess is still primarily in the research and development stage and only now becomingcommercially available, and has been accepted as a new and novel thermal spray technique mainlyin developed countries. The technology has great potential for future research especially withreference to its application to real industrial solution
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.2419.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    UV-resistant, water repellent and rodent repellent nylon tapes for aircraft arrester system (2005)
    Bingley : Emerald
    Pigment & resin technology 34 (2005), S. 270-274 
    Details
    ISSN: 0369-9420
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Purpose - To develop a water repellent (WR), rodent repellent (RR) and UV resistant (UVR) formulation for woven nylon tapes to be used in aircraft arrester system. Design/methodology/approach - UVR, WR and RR formulation for woven nylon tapes were prepared using silicone oil as WR, oleoresin (OR) (red chilly extract) and denatonium benzoate (DB) as RRs, carbon black for UV resistance and butyral resin as binder. Findings - Incorporation of silicon oil improved the water repellency of the processed nylon tapes. DB and OR in the formulation protected the tapes from rats. The former showed excellent protection for nylon tapes in the experimental conditions. More than 150 days of protection has been achieved in comparison to 27 days using OR. The presence of carbon black along with silicon oil and DB in the formulation enabled the nylon tapes UVR-WR-RR in a single processing step. The presence of RRs and WRs within the same formulation did not affect each other's performance. Research limitations/implications - OR and DB were used as RR materials and silicone oil as WR material. In addition, some other RR and WR materials could have been evaluated. Practical implications - The formulation imparts UV resistance, water and rodent repellency to the nylon tapes after processing. Originality/value - This type of formulation is novel for processing of nylon tapes to be used in aircraft arrester systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03699420510620283
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  • 3
    Electronic Resource
    Electronic Resource
    A unique introgression from Moricandia arvensis confers male fertility upon two different cytoplasmic male-sterile lines of Brassica juncea (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A Brassica juncea line carrying an introgression from Moricandia arvensis restored male fertility to two cytoplasmic male-sterile (CMS) B. juncea lines carrying either M. arvensis or Diplotaxis catholica cytoplasm. Genetics of fertility restoration was studied in the F1, F2, F3 and backcross generations of the cross between CMS and fertility-restorer lines. No male-sterile plants were found in F1-F3 generations of the cross between CMS [M. arvensis] B. juncea and the restorer. However, a 1: 1 segregation for male sterility and fertility was observed when the F1 was pollinated with non-restorer pollen from a euplasmic line. These results clearly show that restoration is mono-genic and gametophytic. In CMS lines carrying D. catholica cytoplasm, the restorer conferred male fertility to the F1 and showed 3: 1 and 1: 1 segregations for male fertility and sterility in F2 and BC1 generations, respectively, indicating a monogenic, sporophytic mode of fertility restoration. The results were also supported by pollen stainability in the F1 which was about 65% in M. arvensis-based CMS and 〉90% in D. catholica-based CMS. The above results are discussed in the light of previous molecular studies which showed association between CMS and atpA in both systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2005.01054.x
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  • 4
    Electronic Resource
    Electronic Resource
    Studies of plasma spray coatings on a Fe-base superalloy, their structure and high temperature oxidation behaviour (2005)
    Bradford : Emerald
    Anti-corrosion 52 (2005), S. 84-95 
    Details
    ISSN: 0003-5599
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Purpose - Plasma spray coating technologies are capable of depositing a wide range of compositions without significantly heating the substrate. The objective is to characterise plasma sprayed metallic coatings on a Fe-based superalloy. Design/methodology/approach - NiCrAlY, Ni-20Cr, Ni3Al and Stellite-6 metallic coatings were deposited on a Fe-based superalloy (32Ni-21Cr-0.3Al-0.3Ti-1.5Mn-1.0Si-0.1C-Bal Fe) by the shrouded plasma spray process. The coatings were characterised in relation to coating thickness, porosity, microhardness and microstructure. The high temperature oxidation behaviour of the coatings was investigated in brief. The techniques used in the present investigation include metallography, XRD and SEM/EDAX. Findings - All the coatings exhibited a lamellar structure with distinctive boundaries along with the presence of some porosity and oxide inclusions. The microhardness of the coatings was observed to vary with the distance from the coating-substrate interface. The St-6 coating had the maximum microhardness, whereas the lowest hardness was exhibited by the Ni3Al coating. The phases revealed by XRD of the coatings confirmed the formation of solid solutions, whereas EDAX analysis of the as-sprayed coatings confirmed the presence of basic elements of the coating powders. So far as high temperature oxidation behaviour is concerned, all of the coatings followed the parabolic rate law and resulted in the formation of protective oxide scales on the substrate superalloy. Originality/value - The plasma spray process provides the possibility of developing coatings of Ni3Al as well as commercial available NiCrAlY, Ni-20Cr and St-6 powders on Fe-based superalloy Superfer 800H
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/00035590510584799
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