کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620885 | 988724 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Specific volume and elastic properties of glassy, icosahedral quasicrystalline and crystalline phases in Zr-Ni-Cu-Al-Pd alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Specific volume and elastic properties of glassy, icosahedral quasicrystalline and crystalline phases in Zr-Ni-Cu-Al-Pd alloy Specific volume and elastic properties of glassy, icosahedral quasicrystalline and crystalline phases in Zr-Ni-Cu-Al-Pd alloy](/preview/png/10620885.png)
چکیده انگلیسی
Elastic properties, phase composition, microstructure and specific volume changes in the Zr65Ni10Cu5Al7.5 Pd12.5 glassy alloy during progressive devitrification have been studied by ultrasonic pulse, X-ray diffractometry, transmission electron microscopy and Archimedean methods, respectively, in terms of structure and properties change. On heating the glassy alloy initially forms an icosahedral phase and then a mixture of tI12 Zr2Niss and β-Zrss crystalline phases after annealing at 993 K for 300 s, and lastly tI12 Zr2Niss, tI6 Zr2Pd and hP9 Zr6Al2Ni crystalline phases after prolonged annealing at 993 K for 7.2 ks. In an as-solidified state the alloy shows high Poisson's and K/G ratios of 0.42 and 7, respectively. These parameters are responsible for its good ductility. The structural changes are accompanied by decreases in specific volume, bulk modulus, Lamé parameter and Poisson's ratio. Small specific volume changes upon primary devitrification suggest a close relation between the glassy and the icosahedral structures. The existence of the icosahedral local order, which exhibits rigidity for three-dimensional shear deformation with mixed mode II mode III, may be responsible for good elasticity of the glassy alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 3, February 2007, Pages 1009-1015
Journal: Acta Materialia - Volume 55, Issue 3, February 2007, Pages 1009-1015
نویسندگان
Dmitri V. Louzguine-Luzgin, Mikio Fukuhara, Akihisa Inoue,