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Formation of Fullerene Alloys by Mechanical Alloying and its Characterization

机械合金化富勒烯合金的形成及其表征

基本信息

批准号：
09450271
负责人：
UMEMOTO Minoru
金额：
$ 7.17万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450271/
关键词：
fullerene mechanical alloying metal ball mill mechanical property sintering polymer 炭化物液体クロマトグラフィー

项目摘要

Mechanical alloying (MA) of metal-fullerene was studied with a view to produce new metal-carbon composites. M-0.3 mol% C60(C70) (a mixture of 87 vol.% C60 and 13 vol.% C70), where M=AI, Cu, Fe, Ni, Sn, Ti or Zn were mechanically alloyed, In order to check the stability of fullerene molecules under MA condition, effect of ball milling on C60(C70) was also investigated. X-ray diffraction and HRThM observation revealed that the initial fcc structure of solid fullerene structure turned out to be an amorphous structure after a long time milling. Liquid chromatography and infrared absorption mea- surements done on the mechanically milled C60(C70) showed that the C60(C70) molecules were stable at least up to 3600 ks of milling. However, milling results in a reduced fraction of C60 and for the same time, showed the formation of a dimer of C60 and C60 polymer. . After milling C60(C70) with a metal for 720ks, a small fraction of the initial C60(C70) retained its identity in Al- and Zn-C60(C70) systems, whereas the molecular structure of C60(C70) is lost when the metal was Cu, Fe, Ni or Sn. The sintered compacts made from the MA powder of a M-C60(C70) and a M-graphite showed similar hardness in the cases of M=Cu, Fe and Ni. However, the sintered compacts made from an AI-C60(C70) MA powder showed about a 40% increase in hardness compared with that made from an Al-graphite MA powder. While in the case of Zn, the hardness of the sintered compact made from the Zn-C60(C70) MA powder was less than half of that made from a Zn-graphite MA powder. The stability of C60 in a metal after MA was discussed according to which element group the metal belonged to on the periodic table.

为了制备新型金属-碳复合材料，对金属-富勒烯机械合金化进行了研究。M-0.3mol%C60（C70）（87vol. % C60和13体积% C60（C70），其中M= Al，Cu，Fe，Ni，Sn，Ti或Zn。为了检查在MA条件下富勒烯分子的稳定性，还研究了球磨对C60（C70）的影响。X射线衍射和HRThM观察表明，固体富勒烯结构的初始fcc结构在长时间研磨后转变为无定形结构。用液相色谱法和红外吸收光谱法测定了机械球磨的C60（C70）分子的稳定性，结果表明，机械球磨的C60（C70）分子至少在3600 ks内是稳定的。然而，研磨导致C60的分数降低，并且同时显示C60和C60聚合物的二聚体的形成。.在将C60（C70）与金属研磨720 ks后，一小部分初始C60（C70）在Al-和Zn-C60（C70）系统中保持其身份，而当金属是Cu、Fe、Ni或Sn时，C60（C70）的分子结构丧失。由M-C60（C70）和M-石墨的MA粉末制成的烧结体在M=Cu、Fe和Ni的情况下显示出相似的硬度。然而，由Al-C60（C70）MA粉末制成的烧结压坯显示出与由Al-石墨MA粉末制成的烧结压坯相比硬度增加约40%。而在Zn的情况下，由Zn-C60（C70）MA粉末制成的烧结体的硬度小于由Zn-石墨MA粉末制成的烧结体的硬度的一半。根据金属在元素周期表中属于哪一个元素族，讨论了MA后C_（60）在金属中的稳定性。