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
    Crystallization of colonies of locally aligned grains during thallination of spray-pyrolyzed TlBa2Ca2Cu3Ox thick films (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 2563-2565 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recent microstructural studies of high-Jc, Tl-1223, spray-pyrolyzed thick films have shown that the high-Jc and reduced weak-link behavior can be ascribed to the presence of a unique microstructure, wherein the film is divided into "colonies'' of biaxially aligned regions. In an effort to understand the nucleation and growth of Tl-1223 as well as the formation of the colony microstructure, several sets of films quenched from various stages of the high-temperature thallination process were examined using electron microscopy, x-ray diffraction and electron backscatter diffraction (EBSD). It is found that the crystallization of the 1223 phase is associated with formation of a liquid phase which contains significant amounts of all oxides. Furthermore, it is found that the film nucleates at the substrate on the side closest to the thallium source. The growth front then moves up through the thickness and along the length of the film. X-ray microdiffraction measurements show that local biaxial alignment or the formation of colonies starts to occur at the onset of 1223 crystallization. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.114433
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Grain growth in tungsten rod (1997)
    Springer
    Interface science 4 (1997), S. 81-97 
    Details
    ISSN: 1573-2746
    Keywords: tungsten ; grain growth ; recrystallization ; EBSP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper reports a study of recrystallization and grain growth in tungsten rod. Samples were deformed at elevated temperatures in compression and then annealed. The microstructure was examined by optical metallography, scanning electron microscopy, and electron backscattering diffraction patterns (EBSP) in the scanning electron microscope. The results showed that when the samples were deformed at a high crosshead speed at 1200, 1400, and 1600°C, the microstructure consisted of grains that had developed a high aspect ratio in the regions of the sample that had received the most deformation. When these samples were annealed, a more equiaxed structure was produced. Samples deformed at 1800°C developed very fine recrystallized grains during the mechanical testing. These remained during the anneal. When the crosshead speed was reduced, these fine grains could be observed even after testing at 1200°C. EBSP revealed little, if any, crystallographic texture in the recrystallized grain structure. These results are compared with previous work on tungsten rod to develop a more complete description of this process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00200840
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A study of surface segregation in austenitic stainless steels - factors that control this segregation, its relation to grain boundary segregation and its usefulness for interpreting intergranular corrosion data (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 13 (1988), S. 209-218 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: This paper reports a study of various factors that influence surface segregation in austenitic stainless steels. In particular four rather practical questions are addressed, all of which arose from various concerns about the corrosion behavior of these alloys. They are the following: (1) will significant segregation occur at temperatures below 500°C?; (2) is sulfur segregation affected by the presence of a strong sulfide former such as Mn?; (3) does silicon segregate to interfaces in these alloys?; and (4) do niobium additions affect phosphorus segregation in these alloys? The results show that at temperatures below 500°C, phosphorus, sulfur, nitrogen and silicon will all segregate, although at about 300°C the kinetics of segregation are becoming rather sluggish. Silicon will also segregate at temperatures at least up to 650°C. Manganese additions greatly lower sulfur segregation but niobium additions do not retard phosphorus segregation. In addition to the presentation of these results on surface segregation we consider what can be learned from them about grain boundary segregation and how they can be used to help interpret results on intergranular corrosion and stress corrosion cracking.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740130407
    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...