Investigator: Mgr. Ivo Stloukal, Dr.
Number of Project: 106/05/2115
Agency: Czech Science Foundation
Duration: 01. 01. 2005 - 31. 12. 2007

The aim of the present project is to obtain radiotracer diffusion coefficients in four commercial alloys. The diffusion coefficients of ⁶⁷Ga, ^114mIn, ⁵⁴Mn, ¹²⁴Sb and ⁶⁵Zn will be measured in AZ91 alloy (Mg-Al-Zn-Mn) and in composite AZ91+Saffil, the diffusion coefficients of ^110mAg, ¹³⁹Ce, ⁸⁸Y and ⁶⁵Zn will be measured in QE22 alloy (Mg-Ag-RE-Zr) and in composite QE22+Saffil. Measurements carried out at several temperatures will give activation energy and frequency factors of lattice diffusion. Experiments done with alloys of equal chemical composition and similar microstructure, but once with and once without short-fibers reinforcement will provide an assessment of diffusivities along the interphase fiber/matrix boundaries. The result obtained may be utilized for optimization of technological parameters in fabrication ad/or in thermal treatment of alloys under study in technical practice.

J. Čermák and I. Stloukal: Zn Diffusion in Binary Base of Light Mg-Al Alloys. Def. Dif. For. 263, 2007, 165. (Presented as poster on D_&T 06, 9^th Seminar on Diffusion and Thermodynamics in Materials, September 13-15, 2006, Brno, Czech Republic)

J. Čermák and I. Stloukal: ⁶⁵Zn Diffusion in a Two-Phase Eutectic Mg - 33 vt.% Al. METAL 2006 - 15^th International Metallurgical & Material Conference, Hradec nad Moravicí, Czech Republic, May 23-25 2006, CD-ROM.

J. Čermák and I. Stloukal: Heterodiffusion of ⁶⁵Zn in Binary Mg - x Al Alloys and in A Commercial Alloy AZ91. METAL 2006 - 15^th International Metallurgical & Material Conference, Hradec nad Moravicí, Czech Republic, May 23-25 2006, CD-ROM.

J. Čermák and I. Stloukal: Diffusion of ⁶⁵Zn in Mg and in Mg - x Al Solid Solutions. phys. stat. sol. (a) 203, 2006, 2386.

J. Čermák and I. Stloukal (Eds.): D_&T '06 IX^th Seminar on Diffusion and Thermodynamics of Materials Book of Abstracts, IPM AS CR, Brno, 2006.

J. Čermák and I. Stloukal: Zn Diffusion in Binary Base of Light Mg-Al Alloys. D_&T '06 IX^th Seminar on Diffusion and Thermodynamics of Materials Book of Abstracts, 2006, p. 44.

J. Čermák and I. Stloukal: Diffusion of ⁶⁵Zn in the Mg₁₇Al₁₂ Intermetallic Compound and in the Mg-33.4 wt.% Eutectic. Int. J. Mat. Res. (formerly Z. Metallkd.) 97, 2006, 1476.

J. Čermák and I. Stloukal: Diffusion and Thermodynamics of Materials. Trans Tech Publications, Switzerland, 2007.

J. Čermák and I. Stloukal: Diffusion of ⁶⁵Zn in AZ91 and in QE22 Reinforced by Saffil Fibers. Compos. Sci. Technol. 68, 2008, 417.

J. Čermák and I. Stloukal: Mechanism of ⁸⁸Y Diffusion in QE22 Alloy. METAL 2008 - 17^th International Metallurgical & Material Conference, Hradec nad Moravicí, Czech Republic, May 13-15 2008, CD-ROM.

I. Stloukal and J. Čermák: Diffusion of Zinc in Two-phase Mg-Al Alloy. Def. Dif. For. 263, 2007, 189. (Presented as poster on D_&T 06, 9^th Seminar on Diffusion and Thermodynamics in Materials, September 13-15, 2006, Brno, Czech Republic)

I. Stloukal and J. Čermák: Diffusion of Zinc in Two-Phase Mg - Al Alloy. D_&T '06 IX^th Seminar on Diffusion and Thermodynamics of Materials Book of Abstracts, 2006, p. 50.

I. Stloukal and J. Čermák: Influence of Interfaces upon the Self-Diffusion in AZ91 Alloy Reinforced by Saffil Short Fibres. Mat. Sci. For. 567-568, 2008, 249.

I. Stloukal and J. Čermák: Tracer Diffusion of ⁶⁵Zn, ^110mAg and ⁸⁸Y in QE22 Metal Matrix Composite. J. Alloy Compd. 471, 2009, 83.

I. Stloukal and J. Čermák: Silver Diffusion in Commercial QE22 Magnesium Alloy with Saffil Fiber - Compos. Sci. Tech. 68, 2008, 2799.

I. Stloukal and J. Čermák: Silver Self-Diffusion in Al₂O₃/QE22 Magnesium Alloy Matrix Composite. Def. Dif. For. 283-286, 2009, 155. (Presented as poster on DSL 2008, 4^th International Conference on Diffusion in Solids and Liquids, July 9-11, 2008, Barcelona, Spain)

I. Stloukal and J. Čermák: Diffusion of ⁶⁵Zn in AZ91 and QE22 Alloys with Saffil Reinforcement - Influence of Interfaces Matrix/Saffil. Def. Dif. For. 289-292, 2009, 145. (Presented as poster on DIMAT 2008, 7^th International Conference on Diffusion in Materials, October 28-31, 2008, Lanzarote, Canary Islands, Spain)