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Tang, Fengzai; Gault, Baptiste; Ringer, Simon P.; Martin, Phil; Bendavid, Avi; Cairney, Julie M. |
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Microstructural investigation of Ti-Si-N hard coatings |
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Journal Article |
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2010 |
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Abstract |
Scripta Materialia |
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63 |
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2 |
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Summary Language |
192-195 |
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Titanium silicon nitride; Pulsed laser atom probe (PLAP); Nanostructure; Nanocomposite |
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Abbreviated Series Title |
The microstructures of nanostructured Ti-Si-N hard coatings were investigated by transmission electron microscopy and pulsed laser atom probe. C and O impurities were detected. No evidence of increased Si levels at the grain boundaries was found, suggesting that Si is either in the form of a layer too thin to be detected using the techniques employed or in the form of a solid solution of SiN clusters. |
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1359-6462 |
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NU @ karnesky @ |
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10856 |
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Walls, J. M.; Martin, A. D.; Southworth, H. N. |
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Combined FIM AES and LEED study of the structure and composition of ion- bombarded W surfaces |
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1975 |
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Surface Science |
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Surf. Sci. |
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low energy ion bombardment; Field Ion Microscopy |
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6984 |
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Wu, Ling-Mei; Seyring, Martin; Rettenmayr, Markus; Wang, Wen-Hsiung |
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Characterization of precipitate evolution in an artificially aged Al-Zn-Mg-Sc-Zr alloy |
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Journal Article |
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2010 |
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Materials Science and Engineering: A |
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527 |
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1068-1073 |
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Al-Zn-Mg-Sc-Zr alloy; age hardening; precipitation; transmission electron microscopy (TEM) |
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The precipitates of an age hardenable Al-Zn-Mg-Sc-Zr alloy aged at 140 °C have been studied by transmission electron microscopy (TEM). The results are interpreted in terms of structural transformations that involve two types of Guinier-Preston (GP) zones (I and II), the metastable [eta]’ hardening precipitate and the stable phase [eta]-phase (MgZn2). At early stages of ageing, the GPI zones act as nucleation sites for the plate-like [eta]’ phase which precipitates on the 111Al plane. The transformation from [eta]’ to [eta] occurs gradually at longer ageing times. The [eta] particles mainly consist of [eta]1 and [eta]2 phase, with small amounts of [eta]4 type and minor quantities of [eta]’ type structures. Furthermore, while a fine dispersion of coherent Al3(Sc,Zr) precipitates is known to have a beneficial effect on the strengthening of the alloy, the formation of GPII zones is suppressed in the presence of zirconium that leads to a reduction in the amount of [eta]’ formed during subsequent ageing. |
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0921-5093 |
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NU @ karnesky @ Wu2009 |
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10688 |
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