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high-frequency induction heating of Needle-Shaped Mg-Ferrite for Ablation Therapy of Human Cancer

Journal of Iron and Steel Research International 2012年第S2期19卷 735-738页

作者： NAOHARA Takashi AONO Hiromichi MAEHARA Tsunehiro HIRAZAWA Hideyuki MATSUTOMO Shinya WATANABE Yuji Graduate School of Science and Engineering Ehime University Department of Environmental Materials Engineering Niihama National College of Technology Department of Electronic Control Engineering Niihama National College of Technology Department of Surgery Graduate School of MedicineEhime University

For application as a novel ablation therapy of human cancer,the heating property of a needle-shaped Mg-ferrite prepared by a sintering technique was studied in a high-frequency induction field at 370 *** inserted into cylindrical clay,the increase in temperature(Δ7)was 31.2℃ for the specimen with a 1.5 mm diameter,while the 1.0mm diameter specimen exhibited a ΔT value of 15.7℃ after the induction time of *** ΔT exhibited a high value of 57.9℃ during the simultaneous insertion of 3 1.5mm diameter *** the computer simulation images, the relatively lower magnetic flux density and concurrent neghgibly low current density were observed from the surface to the internal regions,being different from the behavior of a ferromagnetic Ni-rod with the same size.

关键词： high-frequency induction heating cancer therapy ablation treatment eddy current loss residual loss

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Residual stresses of polycrystalline CBN abrasive grits brazed with a high-frequency induction heating technique

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Chinese Journal of Aeronautics 2019年第4期32卷 1020-1029页

作者： Wei XU Yejun ZHU Baicun DU Wenfeng DING College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Department of Computer Engineering Chongqing Aerospace Polytechnic

Residual stresses produced in polycrystalline CBN abrasive grits during a high-frequency induction brazing process are calculated by using ?nite element analysis, with a consideration of the nonuniform temperature distribution in the induction brazing model. The in?uences of induction brazing parameters on the residual stresses of polycrystalline CBN abrasive grits have been analyzed, including the embedding depth, grit side length, etc. Results obtained show that the tensile stress with a 40% embedding depth is 292 MPa, which is the minimum on the bonding interface compared with other embedding depths. Meanwhile, the maximum tensile stress is 575 MPa, with an increase of 59% compared with that of a grit side length of 50 mm. Finally, the simulation results of the brazing residual stress of polycrystalline CBN abrasive grits have been con?rmed valid based on the residual stress measurement of the brazed monocrystalline CBN grit.

关键词： Brazing residual stress Finite element analysis high-frequency induction heating Polycrystalline CBN grit

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