Thermodynamic analysis of the Al–Cu–Zr bulk metallic glass system

Hong, Byungyou; Wang, J.; Jin, S.; Qi, Haiying; Yuan, Xin; Liu, L.B.; Jin, Zhanpeng

doi:10.1016/j.intermet.2010.08.002

Cited by 33 publications

(15 citation statements)

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“…Although the nominal compositions are very similar in the two basic alloys 1Alloy0-0 and 2Alloy0-0, the solidified phases are different. This phenomenon can be explained by the fact that these two compositions are close to the eutectic valley based on the calculated AlCu-Zr ternary diagram [25]. In 2Alloy0-0 AlCu 2 Zr solidified as primary phase (Figs.…”

Section: Resultsmentioning

confidence: 77%

Peculiarities of ball-milling induced crystalline–amorphous transformation in Cu–Zr–Al–Ni–Ti alloys

et al. 2015

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An amorphization process in (Cu 49 Zr 45-x Al 6+x ) 100-y-z Ni y Ti z (x=1, y,z=0;5;10) induced by ballmilling is reported in the present work. The aim was investigation of the effect of Ni and Ti addition to Cu 49 Zr 45 Al 6 and Cu 49 Zr 44 Al 7 based alloys as well as type of initial phases on the amorphization processes. Also the milling time sufficient for obtaining fully amorphous state was determined. The entire milling process lasted 25 hours. Drastic structural changes were observed in each alloy after first 5 h of milling. In most cases, after 15 h of milling the powders had fully amorphous structure according to XRD except for those ones, where TEM revealed a few nanosized crystalline particles in the amorphous matrix. In (Cu 49 Zr 45 Al 6 ) 80 Ni 10 Ti 10 alloy the amorphization process took place after 12 h of milling and the amorphous state was stable up to 25 h of milling. In the case of (Cu 49 Zr 44 Al 7 ) 80 Ni 10 Ti 10 alloy the powders have fully amorphous structure between 12 h and 15 h of milling.

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Section: Resultsmentioning

confidence: 77%

Peculiarities of ball-milling induced crystalline–amorphous transformation in Cu–Zr–Al–Ni–Ti alloys

et al. 2015

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“…Fig. 1 presents the liquidus projection of the Al-Cu-Zr system calculated by H. Bo et al [23] marked with the composition studied in this work. Three compositions in this system were selected in order to investigate the amorphization procedure caused by milling.…”

Section: Methodsmentioning

confidence: 92%

Microstructure evolution in CuZrAl alloys during ball-milling

Tomolya

Janovszky

Benke

et al. 2013

Journal of Non-Crystalline Solids

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Abstract:The microstructure evolution during mechanical milling was studied in the CuZrAl system. The compositions lay on the two liquidus surfaces indicating different solidification processes in the three alloys. Cu(55-x)Zr(35+x)Al10 (x = 0; 5; 10 at%) master alloys were produced by arc melting. After identification of the phases, the master alloys were milled for 25 hours and amorphous/crystalline powders were synthesized. The master alloys contained Al21Cu28Zr51, AlCu2Zr, CuZr and traces of Cu10Zr7 phases in different volume fractions. The optimal milling time was determined to be 15 hours based on the results of X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) examinations. The 5 h milled powder contained CuZr and Al21Cu28Zr51 phases, which diminished due to further milling resulting in amorphous matrix composite with nanosized Al21Cu28Zr51 phase. The thermal stability of the samples was investigated by DSC. The peak temperatures of the first crystallization process of the as-milled powders shifted as function of milling time and polynomial curves were fitted to the measured points.

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“…Most of the calculated results show good agreement www.intechopen.com with the experimental thermodynamic data and the reported phase diagrams. By employing the driving force criterion with the present thermodynamic description, the observed glassforming ability in the Al-Cu-Zr system can be accounted for satisfactorily (Bo, et al, 2010). …”

Section: Application Of the Driving Force Criterionmentioning

confidence: 89%

“…Driving force criterion has been successfully used to explain the composition dependence of GFA in several glass forming alloys with unique GFA, such as Cu-Zr-Ti (Kim, et al, 2004), Mg-Cu-Y (Kim, et al, 2005), Al-Ce-Ni (Tang, et al 2010), and Al-Cu-Zr (Bo, et al, 2010) systems, by calculating the driving force of formation of crystalline phases under metastable supercooled liquid states and by searching the local minima of the driving forces for crystallization. The calculated results are in good agreement with the experimental results.…”

Section: Application Of the Driving Force Criterionmentioning

confidence: 99%