Previous Issue

Volume 42 Number 4 (2011.12)

Special Feature

Materials Analysis

Part I. Special Feature



Research Reports

  • 4. TOF-SIMS Analysis of Engine Oil Additives Adsorbed onto Friction SurfacesPDF(1,881kB)

    pages 31-37
    Atsushi Murase, Hiroyuki Mori and Toshihide Ohmori

    By TOF-SIMS analysis of friction surfaces, the differences in the adsorption behavior of additives between oils of different compositions and tested on different metal surfaces were clarified. The causes of the differences in friction coefficient among various combinations of engine oils and sliding materials were partly explained by the adsorption behavior of the additives.

  • 5. Characterization of the Surface Region of a Cycloolefin Polymer Modified for Electroless PlatingPDF(3,067kB)

    pages 39-45
    Tomoyuki Koga, Takuya Mitsuoka, Yoshifumi Aoki, Yuko Aoki, Eiichi Sudou, Noritomo Suzuki, Takamasa Nonaka, Atsushi Murase, Takashi Yoshida, Wataru Omuro, Fumitaka Yoshinaga and Hiroshi Yanagimoto

    Pd nanoparticles were dispersed to a depth of 100 nm from the surface region of an oxidized cycloolefin polymer film. The Pd catalyst was partially reduced to the metallic form in the surface region of the modified polymer film.

Part II. Highlighted Papers

Research Reports

  • 6. Positioning Technique Based on Vehicle Trajectory Using GPS Raw Data and Low-cost IMUPDF(1,555kB)

    pages 47-54
    Jun-ichi Meguro, Yoshiko Kojima, Noriyoshi Suzuki and Eiji Teramoto

    This paper proposes a technique of position estimation which is applicable to urban environments where the accuracy of GPS positioning is deteriorating. The method, utilizing GPS Doppler processing and gyros, calculates trajectories by extracting the most reliable azimuth, which is then integrated with vehicle speed.

  • 7. Shell Mold Cracking and Its Prediction during the Casting of AC4C Aluminum AlloyPDF(1,171kB)

    pages 55-65
    Shuxin Dong, Yasushi Iwata, Hiroshi Hohjo, Hiroaki Iwahori, Takashi Yamashita and Haruyoshi Hirano

    The mechanism of shell mold cracking during the casting of an aluminum alloy was elucidated. A criterion for shell mold cracking is proposed based on Weibull's statistical method, enabling the prediction of shell mold cracking on the basis of statistical properties of the tensile strength of the shell mold material.

  • 8. Application of Optical Tweezers to Viscosity Measurements of Multi-layer CoatingsPDF(423kB)

    pages 67-72
    Masashi Harada

    A viscometer was developed using optical tweezers that is available for non-destructive measurement of coatings. Multi-layer coatings were prepared by the 3-Wet process and the viscosity of the clear coating was evaluated by the viscometer. The effect of a solvent transfer on the viscosity was observed for the first time.

  • 9. A Phenomenological Multi-zone PDF Model to Predict Transient Behavior of Diesel Engine Combustion PDF(1,474kB)

    pages 73-82
    Kazuhisa Inagaki, Matsuei Ueda, Jun'ichi Mizuta, Kiyomi Nakakita and Shigeki Nakayama

    A novel engine cycle-simulation program was developed to reproduce diesel combustion characteristics for the wide changes of engine operating parameters. In this approach, multi-zoning model and Probability Density Function (PDF) model are newly created to deal with spray formation process with multiple-injection and in-cylinder spatial inhomogeneities, such as local equivalence ratio and temperature.