J. Mater. Sci. Technol. ›› 1997, Vol. 13 ›› Issue (2): 149-153.

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Characteristics of Amorphous Mn_3AlC Phases Formed by Mechanical Milling

Fuxing YIN ; Nanju GU (Hebei Institute of Technology, Tianin 300132, China)T.Shigematsu ; N.Nakanishi(Faculty of Science, Konan University Kobe 658, Japan)Y.Osawa ; A.Sato(National Research Institute of Metals, Tsukuba 305, Japan)   

  • 收稿日期:1997-03-28 修回日期:1997-03-28 出版日期:1997-03-28 发布日期:2009-10-10

Characteristics of Amorphous Mn_3AlC Phases Formed by Mechanical Milling

Fuxing YIN ; Nanju GU (Hebei Institute of Technology, Tianin 300132, China)T.Shigematsu ; N.Nakanishi(Faculty of Science, Konan University Kobe 658, Japan)Y.Osawa ; A.Sato(National Research Institute of Metals, Tsukuba 305, Japan)   

  • Received:1997-03-28 Revised:1997-03-28 Online:1997-03-28 Published:2009-10-10

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摘要： 1.IntroductionMn3MC(M=Ga,Al,ZnInandSn)isagroupofintermetalliccompoundswithperovskite-troestruc-ture,illwhichCatomsarelocatedatthecubicbodycellteredsite,MatthecubiccornersitesandthemagneticMnat0msatthefacecenteredsites.ThestructuralfeaturesandmagneticprthpertiesofthecompoundshavebeensystematicanYstudiedl1'2].Lately,themagneticpropertiesandstructuralfeaturesinsomemagnetcrorderedc0m-poundsatmeta....

Abstract: Amorphization of Mn carbides by rapid quenching method has been proved to be unsuccessful.By mechanical milling in the present work, amorphous phases have been formed in the perovskitetype Mn3AlC compound. The transformation process from crystalline to amorphous phase was found to be milling time controlled, and 10 h is a critical period for the macroscopically single amorphous phase to form. It has been clarified that the redistribution of C atoms is an instinctive factor for amorphous phase to nucleate, and the atomic configuration in the amorphous phase is changed much in longer milling that different crystallizing behaviours have been caused. With X-ray diffraction and differential scanning calorimetry (DSC) results, an atomic configuration transition model is considered for the structures of the amorphous phases changed during milling.