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レッチェのラボ用粉砕機・ふるい振とう機・周辺機器 製品群

ドイツの優れた技術で、試料作成をトータルサポート 全ての工業生産の分野で、製品生産や品質管理の粒度分析をはじめとした、様々な分析の前処理機として、レッチェ社の粉砕機・分級機・縮分器をご使用いただいてます。当社では、年々高まるユーザーニーズに応じて機器の改良を続けています。

当社の設計思想は、古代ギリシャの哲学者アリストテレスの名言”全体は部分の総和を超える”に基づいています。製品の開発にあたって、単に高品質の部品を集めるだけでなく、部品相互の調和を重視しています。この設計思想が当社の製品すべてに行き届いています。

通过声波显微镜研究纯金属钛粉和钛粉以及铁-铜合金的纳米晶体机械性能

Determination of mechanical properties of nanocrystalline materials by means of acoustic microscopy : application of pure elements (Fe and Ti) and alloys (Fe-Cu)

Nanostructured materials are distinguished from conventional polycrystalline materials by their extremely fine crystallite sizes. Because of the extremely small dimension of the grains, a large fraction of the atoms in these materials is located in the grain boundaries. This confers special attributes to this class of new materials.
The elastic modulus of a material is related to the atomic binding forces and characterizes the elastic properties of the material under loading. Young modulus can be measured by sound velocity (Korn et al 1988, Kobelev et al, 1993, Sanders et al 1999), tensile testing (Korn et al 1988, Nieman et al 1991, Wong et al, 1994, Sakai et al 1999 ), nanoindentation (Mayo et al 1992, Mayo et al 1990, Fougere et al 1995) in nc-metals and nc-ceramics upon compacted powders.
Compared to conventional metal, the ratio E/E0 (where E and E0 represent Young’s modulus of nc-metal and conventional metal respectively) is very variable, usually weak, due to important residual porosity which is often not measured.
The objective of the present study is to determine mechanical properties and especially elastic modulus for nc-metals (Fe and Ti) and nc-alloys (Fe-Cu). Dense nanomaterials are necessary involving consolidation of small samples with high pressure.

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