4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

Synthesis of ZrC coatings in a vertical-wall CVD system

5 Jul 2016, 11:50
20m
LT1 (Kramer Law building)

LT1

Kramer Law building

UCT Middle Campus Cape Town
Oral Presentation Track A - Division for Physics of Condensed Matter and Materials Division for Physics of Condensed Matter and Materials (1)

Speaker

Ms Saphina Biira (Department of Physics, University of Pretoria.)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Polycrystalline ZrC coatings were grown on graphite substrates by chemical vapour deposition technique. Zirconium Tetrachloride (ZrCl4) powder and methane (CH4) gas were used as zirconium metal source and carbon source respectively. Argon and hydrogen were used as carrier and dilutant gas respectively. ZrC thin films were deposited at substrate temperatures ranging from 1200 oC to 1600 oC for two hour at atmospheric pressure. The impact of substrate temperature on surface morphology and microstructure of ZrC coatings were examined using X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The variations in crystallite size, dislocation density, texture coefficient, lattice constant and degree of preferred orientations of ZrC films with substrate temperature were established. At lower temperatures of about 1200 oC, the plane (111) had the preferred orientation and as temperature increased to about 1500 oC the preferred orientation shifted to plane (200). The surface morphology and microstructure of ZrC thin films at various substrate temperature were observed using SEM. The SEM results indicated that as the temperature increased from 1400 oC to 1600 oC the uniformity of the surface morphology of ZrC coatings improved.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

YES

Main supervisor (name and email)<br>and his / her institution

Prof JB Malherbe
Email: johan.malherbe@up.ac.za
University of Pretoria

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

No

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

PhD

Primary author

Ms Saphina Biira (Department of Physics, University of Pretoria.)

Co-authors

Mr Bilal Alawad (Department of Physics, University of Pretoria) Dr Hertzog Bisset (Applied Chemistry Division, Necsa) Prof. Johan Malherbe (Department of Physics, University of Pretoria) Dr Johann Nel (Applied Chemistry Division, Necsa) Prof. Philip Crouse (Department of Chemical Engineering, University of Pretoria) Dr Thulani Hlatshwayo (Department of Physics, University of Pretoria)

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