SELF-DIFFUSION OF MANGANESE IN AL-PD-MN ICOSAHEDRAL QUASI-CRYSTALS

被引：22

作者：

NAKAJIMA, H ^{[1
]}

ASAI, J ^{[1
]}

NONAKA, K ^{[1
]}

SHINBO, I ^{[1
]}

TSAI, AP ^{[1
]}

MASUMOTO, T ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1993年 / 68卷 / 05期

关键词：

D O I：

10.1080/09500839308242909

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Self-diffusion of Mn-54 in Al72Pd20Mn8 icosahedral quasicrystals has been investigated over the temperature range from 723 to 1022 K. Concentration depth profiles of the radioisotope Mn-54 in the Al-Pd-Mn quasicrystals and crystals have been measured by an ion-beam sputter-sectioning technique. The temperature dependence of the self-diffusivity of Mn in Al72Pd20Mn8 icosahedral quasicrystals is expressed as D=(1.1(-0.5)(+1.0))x10(-10)exp(-134.+/-4.5k4mol(-1)/RT)m(2)s(-1). The self-diffusivity of Mn in Al72Pd20Mn8 icosahedral quasicrystals is about two orders of magnitude smaller than that in Al60Pd25Mn15 crystalline alloys. The self-diffusivity of Mn in the quasicrystals is abo three to four orders of magnitude lower than Mn diffusivity in crystalline Al.

引用

页码：315 / 320

页数：6

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