PhD Thesis_RuiMSMartins.pdf - RUN UNL

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In-situ XRD studies during growth of Ni-Ti SMA films and their complementary ex-situ characterization After the cutting (3 discs) they are heated up to 130°C in order to remove them from the glass (Fig. C.11). They are then cleaned in acetone ultrasonic bath. (Cutting tool) Fig. C.10: Gatan 601 ultrasonic disc cutter. Fig. C.11: Heating plate. The procedure continues with the polishing of one of the 3 mm discs, using the machine of Fig. C.12. For that the disc is glued (removable glue) to a metallic cylinder. Then the cylinder is introduced into the hole of the support of Fig. C.13(a). This support allows an adjustment of the position of the cylinder in z [Fig. C.13 (b)]. (a) Fig. C.12: Polishing machine. Appendix 233 (b) Fig. C.13: Bottom (a) and top (b) view of the sample support for the polishing machine of Fig. C.12.
In-situ XRD studies during growth of Ni-Ti SMA films and their complementary ex-situ characterization The disc is polished from 500 µm up to 300 µm using a sand paper of 15 µm. The disc is then glued on the other side and it is polished again with the 15 µm sand paper but this time until it reaches a thickness of 180 µm. With a 10 µm sand paper the disc is thinned up to 130 µm. The final step to reach a thickness of 120 µm is performed with a 3 µm sand paper. The disc of 3 mm diameter and a thickness of 120 µm is glued on a glass support in order to be subjected to a delicate polishing in the machine of Fig. C.14. Fig. C.14: Polishing machine (Minimet 1000) - allows random movements for final polishing. This machine performs random movements, which avoids preferential scratches on the sample (disc). Al 2 O 3 of 5, 1 and 0.3 µm diameter are used (6 min/speed 10). The following step is dimple-grinding in order to polish a calotte in the centre. For that the disc is glued on a polymeric cylinder. The better-polished face is glued directly on the cylinder. A Dimple Grinder gatan 656 is used for this operation (Fig. C.15). Appendix 234
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RUI MIGUEL DOS SANTOS MARTINS IN-SI
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ACKNOWLEDGEMENTS The research work
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At CENIMAT, Luís Pereira also carr
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SUMÁRIO O fabrico de películas fi
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LIST OF SYMBOLS AND ABREVIATIONS α
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TABLE OF CONTENTS Introduction ....
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LIST OF FIGURES Fig. 1.1: Power/wei
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Fig. 2.3: Calculated integrated pho
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Fig. 3.25: Pole figures of Ni-Ti B2
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Fig. 3.66: SAED pattern obtained on
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LIST OF TABLES Tab. 1.1: Factors af
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In-situ XRD studies during growth o
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