Structural Investigation of the Metallic Glasses Mg 85.5 Cu 14.5 and Mg 70 Zn 30

Steeb

Grallath

1983

Self Cite

The structure of amorphous Cu 57 Zr 43 has been investigated by neutron diffraction using the isotopic substitution method with the isotopes 63 Cu and 65 Cu besides natural Cu. From the scattering contribution of concentration fluctuations to the measured structure factors and from the atomic distances chemical ordering is concluded to exist in amorphous Cu 57 Zr 4 3. The structural results are compared with previous experimental and theoretical investigations of CuZr-and other binary metallic glasses formed by transition metals. Evidence is given that the topological as well as the chemical short range order is asymmetric in respect to both components in this type of metallic glasses.

Section: Experimental Data From Literaturementioning

confidence: 83%

Neutron Diffraction Study on the Structure of the Metallic Glass Cu₅₇Zr₄₃

Steeb

Grallath

1983

Self Cite

“…Fitting the main peak of the total pair correlation function obtained with the Ni 53 B 47 molten alloy in Fig. 4 by a Gaussian curve in a similar way as reported in [10] yields by forming the difference between the fit and the experimental curve a further coordination shell which is centered at about 2 A (see Figure 5). …”

Section: Molten Ni-b Containing 47at% B A) Structure Factormentioning

confidence: 90%

Structure of Ni-B-Melts by Means of X-Ray Diffraction

Nassif

Sedelmeyer

et al. 1983

Self Cite

The structural results for molten Ni 81 B 19 are compared with the structure of a metallic glass which can be obtained at the same composition by rapid quenching the melt within a melt spin equipment. Structural relationship exists between the molten and the amorphous state. This feature follows especially from a marked asymmetry of the second maximum of the structure factor obtained from the melts, to which corresponds the splitting up of the second maximum in the total structure factor of the amorphous specimen. With the Ni 53 B 47 -and the Ni 4 3B 57 -melts which don't belong to the concentration range of glass-forming Ni-B-melts no peculiarities in the range of the second maximum of the structure factor were observed.

“…The preparation of the melt spun samples, the diffraction experiments and the evaluation of the structural data were essentially done as reported previously [1]. The Ca-Mg samples had to be alloyed in a glove-box and melt spun immediately after alloying.…”

Section: Experimental and Data Reductionmentioning

confidence: 99%

“…In recent structural investigations on the metalmetal glasses Mg 85 5 Cui4.5 and Mg 7 oZn 3 o [1] chemical short range order (CSRO) and correspondence of the coordination of the Cu atoms in the Mg-Cu glass with that in crystalline Mg 2 Cu was found. The present paper is a continuation of these investigations.…”

Section: Introductionmentioning

confidence: 98%

X-Ray Diffraction Study on the Structure of the Metallic Glasses Mg₈₄Ni₁₆ and Mg₃₀Ca₇₀

Nassif

Steeb

1983

Self Cite

The total structure factors as well as the total pair correlation functions of amorphous Mg 84 Ni 16 and Mg3 0 Ca 70 were determined by X-ray diffraction. The Mg-Ni glass shows rather strong chemical short range ordering. By Gaussian fit of the total pair correlation function partial coordination numbers and atomic distances were obtained. Similar surrounding of the Ni atoms in the amorphous phase and in crystalline Mg 2 Ni was found. The structural features of the Mg-Ca glass differ from those of the Mg-Ni glass.