Fracture In Polycrystalline Iridium Coating
Source abstract
Abstract
Iridium coating was prepared by the double glow plasma. The phase identification and the microstructure observation of the fracture surface of the coating were examined by X-ray diffraction and scanning electron microscopy, respectively. The deposition rate of the coating was up to 20µm/h. The iridium coating failed predominantly by grain boundary brittle fracture at room temperatures. Brittle intergranular fracture does not depend on grain size. Intergranular fracture in iridium coating has been considered to arise from low cohesive strength of the grain boundaries.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Intermetallics and Advanced Alloy Properties · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
Show source-provided references
1. Hecker S.S., Rohr D.L. (1978) Brittle fracture in iridium. Met Trans 9: 481–48810.1007/BF02646403 ↗
2. Cawkwell M.J. (2005) Origin of brittle cleavage in iridium. Science 309: 1059–106210.1126/science.1114704 ↗
3. Panfilov P. (2007) Deformation tracks distribution in iridium single crystals under tension. J Mater Sci 42: 8230–823510.1007/s10853-007-1722-7 ↗
4. Panfilov P., Yermakov A. (2001) Brittle intercrystalline fracture in iridium. Platinum Metals Rev 45(4): 179–18310.1595/003214001X454176178 ↗
5. Panfilov P., Dmitriev A.V. (1991) The plastic flow of iridium. Platinum Metals Rev 35(4): 196–20010.1595/003214091X354196200 ↗
6. Panfilov P., Yermakov A. (2004) Mechanisms of inherent and impurity-induced brittle intercrystalline fracture in pure FCC-metal iridium. International Journal of Fracture 128: 147–15110.1023/B:FRAC.0000040977.26875.1f ↗
7. Panfilov P., Yermakov A. (2004) On brittle fracture in polycrystalline iridium. J Mater Sci 39: 4543–455210.1023/B:JMSC.0000034148.03387.71 ↗
8. Heatherly L., George E.P. (2001) Grain-boundary segregation of impurities in iridium and effects on mechanical properties. Acta mater 49: 289–29810.1016/S1359-6454(00)00313-X ↗
9. Liangbing Wang, Zhaofeng Chen. (2008). Ir coating prepared on Mo substrate by double glow plasma. J Coat Technol Res doi: 10.1007/s11998-008-9123-710.1007/s11998-008-9123-7 ↗
10. Ying Zhang, Zhaofeng Chen. (2008). Phase and microstructure of tungsten coating on C/C composite prepared by double-glow plasma. doi: 10.1016/j.fusengdes.2008.07.03310.1016/j.fusengdes.2008.07.033 ↗
11. Hamilton J.C., Yang N.Y.C. (1992) Diffusion mechanisms in chemical vapor-deposited iridium coated on chemical vapor-deposited rhenium. Metall Mater Trans A 23(3): 851–85510.1007/BF02675562 ↗
12. Mumtaz K., Echigoya J. (1993) Iridium coatings on carbon-carbon composites produced by two different sputtering methods: a comparative study. J Mater Sci Lett 12: 1411–141210.1007/BF00591591 ↗
13. Panfilov, P. (2002). Brittle transcrystalline fracture in plastic face centered cubic Metal Iridium. International Symposium on Iridium: Structure and properties. Publication of TMS, USA 2002, 13–14.
14. Gornostyrev, YuN., Mriasov, O.N. (2000) Microscopic theory of defect structure and peculiar mechanical properties of iridium. International Symposium on Iridium: Structure and properties. Publication of TMS, USA 2000, 42–43.
15. Panfilov, P, Yermakov, A. (2002). On brittle fracture in pure polycrystalline FCC-metal. Mechanisms and Mechanics of Fracture: Symposium in the Honor of Professor or J. F. Knott: Damage and Fracture. Publication of TMS, USA 2002, 125–26.
16. Pugh S.F. (1954) Relations between the elastic moduli and the plastic properties of polycrystalline pure metals. Phi Mag 45: 823–84310.1080/14786440808520496 ↗
17. Rice J.R., Thomson R. (1974) Ductile versus brittle behaviour of crystals. Phil Mag 29: 73–9710.1080/14786437408213555 ↗
18. Reynolds Jr.C.L, Couchman P.R. (1976) On the relation between surface energy, melting temperature and interatomic separation for metals. Phil Mag 34: 659–66110.1080/14786437608223804 ↗