Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Wavelength shifting and amplification of optical pulses through cascaded second-order processes in periodically poled lithium niobate (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 136-138 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigate the efficiency of wavelength shifting (generation of a pulse at the wavelength λp−Δλ from a signal at λp+Δλ under the action of a pump at λp) and parametric amplification through a cascaded second-order process in a periodically poled lithium niobate crystal. Our results show that, in a 19-mm-long sample, at λp=1.8 μm and Δλ as large as 60 nm, wavelength shifting with unit gain can be obtained with a pump intensity of 6 MW/cm2, while amplification by a factor 10 requires 18 MW/cm2. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121734
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Corrosion behavior of Fe(Ni)CrAIX alloys in an HCl−H2O−H2 gas mixture at 800°C (1995)
    Springer
    Oxidation of metals 43 (1995), S. 491-508 
    Details
    ISSN: 1573-4889
    Keywords: Fe(Ni)CrAlX alloys ; chloridation resistance ; oxide scales ; chlorides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The high-temperature-corrosion behavior of a series of Fe(Ni)CrAlX-type alloys (where X=Zr and Hf, e.g.) has been studied in a gas mixture of 50% HCl-10% H2O−H2 at 800°C. The experimental results obtained indicated that Ni-base alloys had superior corrosion resistance to Fe-base alloys in this gas mixture. While the exposed Ni-base alloys showed weight gains due to the formation of oxides (e.g., Al2O3, Cr2O3) as well as CrCl2, the Fe-base alloys exhibited substantial weight losses resulting from the formation and subsequent evaporation of FeCl2. This study also demonstrated that Fe(Ni)Cr8AlX-type alloys, which contained high aluminum, had better chloridation resistance than Fe(Ni)25CrAlX-type alloys, which had high chromium. The improved performance of Fe(Ni)Cr8AlX-type alloys was due to the presence of a high level of aluminum which promoted formation of protective Al2O3. Although the presence of chromium in the alloys promoted the formation of Cr2O3, the high level of chromium adversely affected the chloridation resistance of Fe(Ni)25CrAlX-type alloys, due to the development of chloride (CrCl2) at the interface of the oxide scale and alloy substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01046895
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    High-temperature corrosion of Ti and Ti-6Al-4V alloy (1996)
    Springer
    Oxidation of metals 45 (1996), S. 507-527 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; sulfidation ; oxides ; sulfides ; Ti ; Ti-6Al-4V alloy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Pure titanium and Ti-6Al-4V were exposed at 750°C in an H2/H2O/H2S PO 2≈10−18 Pa and PS 2≈10−1 Pa), H2/H2O (PO 2≈10−18 Pa) and air environments for up to 240 hr. The corrosion kinetics, obtained by the discontinuous gravimetric method, showed that the sulfidation/oxidation kinetics were linear for Ti and linear-parabolic for Ti-6Al-4V in the H2/H2O/H2S environment. Both materials obeyed parabolic rate laws in the H2/H2O atmosphere after a transient period, and linear-parabolic rate laws in air. After exposure to the H2/H2O/H2S atmosphere, the titanium specimen displayed a double scale of TiO2 with an intervening TiS2 film between the double-layered scale of TiO2 and the substrate. Ti-6Al-4V also contained a double layer of TiO2 together with a stratum consisting of Al2S3, TiS2 and vanadium sulfide at the junction of the inner TiO2 layer and substrate. Some Al2O3 precipitated in the external portion of the outer TiO2 layer. Following oxidation in the low-PO 2 atmosphere a double-layered oxide of TiO2 scale formed on both Ti and Ti-6Al-4V. The scale on Ti-6Al-4V also contained an α-Al2O3 film situated between the outer and inner (TiO2) layers. For both materials, multilayered-scale formation characterized air oxidation. In detail a multilayered oxide scale of TiO2 formed on the air-oxidized Ti, while a multilayered oxide scale with alternating layers of Al2O3/TiO2 developed on Ti-6Al-4V oxidized in air.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01046849
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effect of Nb coating on the sulphidation/oxidation behaviour of Ti and Ti-6Al-4V alloy (1995)
    Springer
    Journal of materials science 30 (1995), S. 2640-2647 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The environmental response of Nb-coated Ti and Ti-6Al-4V alloy was studied at 750 °C in an atmosphere of pS2 ∼ 10−1 Pa and pO2 ∼ 10 −18 Pa. By acting as a diffusion barrier and through the formation of a Nb1−xS scale the Nb coating deposited enhanced the corrosion resistance of both Ti and Ti-6Al-4V alloy. The corrosion products generated on uncoated titanium in the same environment and temperature were characterized by a double layered oxide scale of TiO2 beneath which a TiS2 layer was formed. For the Ti-6Al-4V alloy, α-Al2O3 was precipitated in the external portion of the outer-layer of TiO2 whilst a layer containing Al2S3, TiS2 and vanadium sulphide (possibly V2S3) was idenitified underlying the inner TiO2 layer. After prolonged exposure (168 h), the Nb coating deposited on Ti and Ti-6Al-4V alloy was consumed. A scale following the sequence of TiO2/TiO2+NbO2+Nb2O5/Nb1−xS/TiO2/ TiS2/(substrate) was observed on the surface of the Nb-coated Ti, whilst a scale with sequence of TiO2/V2S3/TiO2+NbO2+Nb2O5/Nb1−xS/TiO2/Al2S3+TiS2/(substrate) characterized the corrosion products formed on the Nb-coated Ti-6Al-4V alloy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00362147
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Experiments on the parametric vibration response of plates under tensile loading (1997)
    Springer
    Experimental mechanics 37 (1997), S. 56-61 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Results of an experimental investigation of the parametric vibration response characteristics of plates subjected to tensile edge loads are presented. Two distinct types of parametric instability behavior are observed: principal resonance and secondary resonance. The principal resonance zones are found to be more dominant. It was observed that the natural frequencies and the boundaries of the instability regions of the plate are considerably influenced by the nature of the edge loading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328750
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...