• Title/Summary/Keyword: Ko/w

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VeKo25Cr: A Corrosion and Wear Resistant Powder Metallurgical Alloy with a Basic Hardness of 52 HRC

  • Hofer, Beat W.;Saner, Michel
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09b
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    • pp.942-943
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    • 2006

  • To meet the demands for use in extremely abrasive and corrosive environments, a new material was developed. The VeKo25Cr distinguishes itself through specifically selected amounts of carbon and carbide forming elements such as Cr, Mo, V, W and Nb. The alloy is based on a Fe matrix. The strength after heat treatment and the wear and corrosion properties are compared to those of other materials. VeKo25Cr can be combined with easy-to-process materials such that the difficult handling is minimized to those places on the piece most subjected to operational wear.

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Ixora auricularis Chun & F. C. How ex W. C. Ko (Rubiaceae): A new record to Flora of Vietnam (Ixora auricularis Chun & F. C. How ex W. C. Ko: 베트남 미기록종)

  • Thieu, Thi Huyen Trang;Tran, The Bach;Nguyen, Dinh Hai;Choi, Sangho;Eum, Sangmi
    • Korean Journal of Plant Taxonomy
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    • v.46 no.4
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    • pp.356-360
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    • 2016

  • Ixora auricularis (Rubiaceae), previously recognized as endemic to Yunnan (China), was reported in Vietnam. This plant differs from the closely related species Ixora coccinea in its auriculate shape of the base leaf, greater number of secondary veins, shorter stipules, calyx having more appendices, shorter corolla tube, and the oblanceolata shape of the corolla tip. Detailed information about its description as well as illustrations, color photographs and a species key of related species of Ixora in Vietnam are provided.

  • https://doi.org/10.11110/kjpt.2016.46.4.356 인용 PDF KSCI