ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Sulfur segregation during the high-temperature oxidation of chromium (1991)
    Springer
    Oxidation of metals 36 (1991), S. 491-491 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; adhesion ; sulfur ; growth mechanisms ; grain boundaries ; chromia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A TEM and STEM examination has been carried out of cross-sectioned specimens of convoluted chromia scale formed by oxidizing chromium at 950° C. Sulfur was detected at the oxide/metal interface and the oxide grain boundaries (apart from low-angle grain boundaries), but not within the oxide grains. These results are consistent with the “sulfur effect” theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01151594
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An Investigation of the Growth Mechanism of Scale Formed on Chromium Containing Low Amounts of Sulfur, Chlorine, and Phosphorus (2000)
    Springer
    Oxidation of metals 54 (2000), S. 509-525 
    Details
    ISSN: 1573-4889
    Keywords: chromium ; sulfur ; chromia ; growth-mechanism ; Fe–Cr alloy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The growth mechanism of the flat and adherent scale formed at 900°C in 0.1 atm oxygen on chromium, which contained 1 ppm (wt) sulfur, 0.08 ppm (wt) chlorine, and 0.2 ppm (wt) phosphorus, has been found to be very different in adjacent parts of the scale, consistent with the results of previous tracer studies of the growth mechanism of chromia formed on chromium. In some places, it grew primarily by chromium transport, while in others it grew primarily by oxygen transport and in still others it grew by a mixture of both. New oxide formed within the outer part of the scale and, in some cases, throughout the scale. A tentative hypothesis is proposed to explain why growth mechanisms were different in different parts of the scale on the same specimen. The scale formed at 950°C on Fe–20%Cr–0.11%Si, which contained 15 ppm sulfur, grew predominantly by cation transport, with only a small amount of oxygen transport. In this case also, new oxide formed within the outer part of the scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004646803204
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Dispersoids in Al–Li AA8090 series alloys (1997)
    Springer
    Journal of materials science 32 (1997), S. 3341-3347 
    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 Chemical composition data of Al3Zr-type dispersoids obtained using the EDAX attached to the transmission electron microscopes in three commercial AA8090 series Al–Li alloys demonstrated the incorporation of Ti in these dispersoids. The extrapolation technique led to the composition of dispersoids to be Al3(Zr0.92Ti0.08). No dispersoids were found other than Al3Zr-type in these alloys although one of the alloys contained Mn. Appearance of Mn-rich dispersoids in one of the re-cast alloys which contained Mn showed that the solubility of Mn in Al is significantly influenced by the Li concentration in Al–Li alloy systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018648011788
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Dislocations and voids in pyroxene from a low-temperature eclogite: Mechanism of eclogite formation (1974)
    Springer
    Contributions to mineralogy and petrology 43 (1974), S. 91-98 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract A transmission electron microscope study of dislocations and imperfections in omphacites of a low-temperature California eclogite has revealed a dislocation array related to a continuous creep phenomenon. Structures are appropriate to a combination of deformation and annealing processes similar to those observed in the hot working of some metals. The study has revealed the presence of voids or possible fluid inclusions which may indicate that the basalt to eclogite reaction was catalysed by a fluid phase which must have had a very low partial pressure of water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572712
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    An electron microscopic study of a lunar pyroxene (1971)
    Springer
    Contributions to mineralogy and petrology 33 (1971), S. 171-183 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Ion-thinned samples of lunar rock 12052 have been examined in the electron microscope. Exsolution textures have been observed in the pyroxene on a finer scale than those found in Apollo 11 rocks, indicating a faster cooling rate. The early stages of the reaction involve modulations on both (001) and (100) which suggest that decomposition may occur by a spinodal mechanism. A two-stage exsolution structure in the augite rim of a phenocryst is consistent with a sudden increase in the cooling rate—possibly when the magma was extruded onto the surface of the moon. The presence of antiphase domains in all primary and precipitated pigeonites confirms that pigeonites of all compositions have the space group C2/c at high temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00374061
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of diffusion bonds formed between superplastic sheet materials (1996)
    Springer
    Journal of materials science 31 (1996), S. 5199-5206 
    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 Diffusion bonds produced in microduplex titanium and stainless steel sheet materials for various bonding conditions have been evaluated using a range of techniques. These include light and scanning electron microscopy (SEM), scanning acoustic microscopy (SAM) and compressive lap shear testing. The potential of other procedures such as ultrasonic inspection and resistivity measurement are also discussed. For imperfect bonds, the bond line in titanium alloys consists of clearly defined interfacial voids separated by metallurgically sound bonded regions, while the unbonded regions in stainless steel often consist of long flat voids in which the opposing surfaces have contacted but not bonded. It was observed that light microscopy and SEM observations provide a convenient and reliable method for the assessment of the bond quality, and in the case of titanium alloys it is possible to obtain quantitative data on the extent of bonding. High frequency SAM also proved to be an effective procedure for qualitative assessment. A linear relationship between the fraction of parent metal strength achieved and bonded area fraction as determined by metallography was observed for titanium alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00355925
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The relationship between the microstructure and microwave dielectric properties of zirconium titanate ceramics (1996)
    Springer
    Journal of materials science 31 (1996), S. 2539-2549 
    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 Zirconium titanate (ZrTiO4) ceramics have been prepared by the mixed oxide route using small additions of ZnO, Y2O3 or CuO. Specimens were sintered mainly at 1400 °C and cooled at various rates: water-quench, air-quench, 300 °C h−1, 120 °C h−1, 6 °C h−1 and 1 °C h−1. Products prepared with additives exhibited densities of at least 93% of the theoretical value. As the cooling rate after sintering was decreased, the length of the lattice parameter in the b direction was reduced and transmission electron diffraction revealed superlattice reflections associated with cation ordering. For specimens cooled at 1 °C h−1, electron diffraction patterns exhibited features consistent with an incommensurate superstructure in the a direction. The dielectricQ value of rapidly cooled (air-quenched) ceramics was 2000 at 5 GHz. With an increase in the degree of cation ordering theQ value increased to a maximum of 4400 for specimens cooled at 6 °C h−1. For specimens cooled at the slowest rate (1 °C h−1) theQ value fell to 2000 due in part to the presence of microcracks and exsolved ZrO2. Diffusion of trivalent impurities (yttria) into the host ZrTiO4 grains also led to a lowering of theQ values. The microwave dielectric properties of zirconium titanate ceramics are sensitive to processing conditions and mircrostructural features. The highestQ values (lowest loss) should be achieved in homogeneous specimens, free of trivalent impurities and lattice defects, in which lowQ-value second phases, microcracks and pores are eliminated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687279
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    An electron-microscopic study of precipitation (exsolution) in an amphibole (the hornblende-grunerite system) (1974)
    Springer
    Journal of materials science 9 (1974), S. 184-192 
    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 Transmission, analytical and high-voltage electron microscopy have been used to study the distribution of phases in the naturally occurring silicate minerals hornblende and grunerite. These two minerals belong to the amphibole group and previous analytical work has suggested the existence of a miscibility gap between them involving the segregation of calcium. The minerals in the specimens studied are coarse-grained, having crystallized slowly during metamorphism. Large lamellar precipitates are present in both phases. These precipitates form on (100) and (¯101) planes of the matrix and have remained coherent. Steps are present on the broad faces of these lamellae, suggesting that they have thickened by the propagation of ledges as observed in metal alloy systems. These features are common to both phases, but the grunerite matrix contains an additional set of fine, coherent precipitates which have formed at a later stage and show distinct precipitate-free zones around the earlier precipitates. Analytical microscopy has been used to confirm qualitatively that the precipitation involves segregation of calcium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550940
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Applications of electron microscopy to minerals (1973)
    Springer
    Journal of materials science 8 (1973), S. 460-460 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550448
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Precipitation (exsolution) in an orthopyroxene (1973)
    Springer
    Journal of materials science 8 (1973), S. 467-474 
    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 Ion-thinned samples of orthopyroxene from the Stillwater complex, Montana, have been examined in the electron microscope at 100 and 1000 kV. Exsolution lamellae of a calcium-rich, monoclinic pyroxene (augite) up to 0.5 μm in width were observed parallel to (100) of the matrix. The interface between the matrix and precipitate is semi-coherent and consists of a regular network of dislocations. Nucleation occurs at grain boundaries, subgrain boundaries and individual dislocations. Subsequent growth takes place by the movement of ledges along the (100) interface. The matrix orthopyroxene also contains coherent, homogeneously-distributed precipitates (GP zones). A precipitate-free zone occurs adjacent to each augite lamella.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550450
    Location Call Number Expected 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...