Netsu Sokutei
Online ISSN : 1884-1899
Print ISSN : 0386-2615
ISSN-L : 0386-2615
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Volume 28, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • Anomaly in Electrical Resistivity with Thermoelastic Martensitic Transformation of Shape Memory NiTi Alloy
    Hitoshi Matsumoto
    2001 Volume 28 Issue 1 Pages 2-7
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.2
    JOURNAL FREE ACCESS
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    For a better understanding of the thermoelastic martensitic transformation in near equiatomic NiTi, the measurement of electrical resistivity is precisely performed by a four-probe potentiometric method. The transformation behavior of NiTi depends on the martensitic transformation start temperature (Ms) and thermal cycling with a repetition of transformation. The NiTi with a higher Ms shows a one-stage transformation, of which the Ms decreases with increasing the number of complete thermal cycles. Moreover, a resistivity hump appears in the vicinity of Ms after an incomplete thermal cycle, which correspond to the formation of the R-phase. On the other hand, The NiTi with a lower Ms has a tendency to show a two-stage transformation and its peak in resistivity is enhanced by complete thermal cycles to result in further enlargement of the temperature range of R-phase. The resistivity in the high-temperature phase is nonlinear to temperature, which imply that a pre-martensitic phenomenon extend over a wide range of temperature. The shift of the transformation temperature and the enhancement of the R-phase with increasing thermal cycling are taken to be attributable to the accumulation of transformation-induced defects.
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  • Two-Dimensional Molecular Solids Formed at Gas-Solid and Solid-Liquid Interfaces
    Akira Inaba
    2001 Volume 28 Issue 1 Pages 8-17
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.8
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    Calorimetry and neutron scattering techniques are combined to study the structures and phase transitions occurring in various 2-D molecular solids formed at gas-solid and solid-liquid interfaces. The solid monolayers of methyl fluoride and methyl chloride adsorbed on the surface of graphite exhibit a phase transition, the former is of an order-order type and the latter of an order-disorder type. The 2-D molecular solids of various molecules including alkanes and carboxylic acids formed at an interface of the bulk liquids and graphite melt well above the bulk melting temperatures, whereas the 2-D solids formed on the surface of graphite melt well below the bulk melting temperatures. It is considered that the 2-D solids formed at gas-solid interface melt to form the 2-D liquids, whereas the 2-D solids formed at solid-liquid interface melt to form the bulk liquids.
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  • Microscale Thermal Measurement by Scanning Thermal Microscopy
    Osamu Nakabeppu
    2001 Volume 28 Issue 1 Pages 18-28
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.18
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    The Scanning Thermal Microscopy (SThM) has been developed since 1986 by adding a temperature detective function with various techniques to the Scanning Tunnel Microscopy (STM) or the Atomic Force Microscopy (AFM). The SThM can measure temperature and thermal properties distribution with spatial resolution of less than 100nm. The remarkable improvement in the spatial resolution for thermal measurements will enable direct thermal observation of submicron structures, such as micro-electric devices, ICs, composite materials, and local catalytic reactions. This review introduces the present state and features of various types of SThM, and then gives a detailed description of a promising SThM with a thermocouple cantilever probe. Furthermore, an active method for the accurate real temperature measurement with high spatial resolution is introduced.
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  • Frontiers of Solid-Gas Interaction Research As Extended by Application of Atmosphere-Controlled High Temperature Mass Spectrometer and High Temperature Kelvin Prove
    Michio Yamawaki, Kenji Yamaguchi
    2001 Volume 28 Issue 1 Pages 29-35
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.29
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    This study has reviewed (i) improvement of performance of atmosphere-controlled high temperature mass spectrometer (ACHTMS), (ii) application of ACHTMS to studies of high temperature solid-gas reactions of oxide ceramics, and (iii) application of high temperature Kelvin probe (HTKP) to solid-gas interactions on oxide ceramics.
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  • phlogiston
    2001 Volume 28 Issue 1 Pages 36-37
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.36
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  • Characterization of Polypropylene blockcopolymer by Temperature Dependent Scanning Probe Microscope and Dynamic Mechanical Analysis
    Nobuaki Okubo, Takehiro Yamaoka
    2001 Volume 28 Issue 1 Pages 38-39
    Published: January 15, 2001
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.28.38
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