Home Kovove Materialy-Metallic Materials 2010 Metallic Materials Vol. 48 (2010), no. 2, pp. 117 - 126

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Metallic Materials Vol. 48 (2010), no. 2, pp. 117 - 126

Title: A study of microstructure and solidification behavior of Zn-Cu alloy

Abstract: Normal 0 21 false false false SK X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Normálna tabuľka"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Zn–1.5wt.% Cu peritectic alloy was prepared in a graphite crucible under a vacuum atmosphere. Unidirectional solidification of Zn–1.5wt.% Cu peritectic alloy was carried out with the Bridgman method by using metals of  99.99% purity under the argon atmosphere and two different conditions; with a temperature gradient (G) range of 1.99-7.81 K mm-1 at constant growth rate (V) and a growth rate range of 8.41-661.11 mm s-1 at a constant temperature gradient. The microstructures of the directionally solidified Zn–1.5wt.% Cu peritectic samples were observed to be a cellular. From both transverse and longitudinal sections of the samples, cellular spacing (l) and cell tip radius (R) were measured and expressed as functions of solidification processing parameters (G and V) using a linear regression analysis. The experimental results were also compared with values calculated according to the current theoretical and numerical models, and similar previous experimental results.

Keywords: metals & alloys, peritectic solidification, cellular growth, crystal growth
Year: 2010, Volume: 48, Issue: 2 Page From: 117, Page To: 126

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