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  • Condensed Matter: Structure, etc.  (1)
  • Launch Vehicles and Launch Operations  (1)
  • 2010-2014  (1)
  • 1965-1969  (1)
  • 1955-1959
  • 1
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    Signatures of a Pressure-Induced Topological Quantum Phase Transition in BiTeI (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-10-09
    Description: Author(s): Xiaoxiang Xi, Chunli Ma, Zhenxian Liu, Zhiqiang Chen, Wei Ku, H. Berger, C. Martin, D. B. Tanner, and G. L. Carr We report the observation of two signatures of a pressure-induced topological quantum phase transition in the polar semiconductor BiTeI using x-ray powder diffraction and infrared spectroscopy. The x-ray data confirm that BiTeI remains in its ambient-pressure structure up to 8 GPa. The lattice param... [Phys. Rev. Lett. 111, 155701] Published Tue Oct 08, 2013
    Keywords: Condensed Matter: Structure, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    Joining of Nickel and Nickel-Base Alloys (1966)
    In:  CASI
    Details
    Publication Date: 2019-12-13
    Description: Nickel and nickel- base alloys are amenable to joining with many of the familiar joining processes. Some new joining processes also have been used successfully. In general, conventional joining procedures are used with only slight required modifications, depending on the particular alloy to be welded. However, some special precautions must be taken. Harmful materials must be removed from the joint or surrounding areas or they may damage the weld and the nearby heated parent metal. Some high-strength age hardenable alloys are prone to cracking in or near joint areas, unless the material is in the proper condition of heat treatment prior to joining operations. Foreign material and flux residues left from joining operations can cause trouble in subsequent service if not removed. Procedures for joining these alloys have been developed that eliminate or minimize the usual difficulties that have been experienced. When proper procedures are employed, joining of nickel and nickel- base alloys can be performed satisfactorily.
    Keywords: Launch Vehicles and Launch Operations
    Type: NASA-TM-X-53447 , RSIC-484
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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