3/26(一)專題演講公告

 

2018-3-26 Professor Philippe COLOMBAN

演講人:Professor Philippe Colomban

服務單位:Sorbonne Université, CNRS, UMR 8233, MONARIS, F-75005, Paris, France

演講題目: Understanding the fracture and fatigue at the chemical bond scale:

                   the potential of Raman spectroscopy. Application to fibres.

演講時間:107.03.26上午10點10分~12點10分

演講地點:工綜館203國際演講廳

個人學經歷:

    After an MSc in Ceramics, glass & Cement Engineering in 1975 and an MSc in Solid State Physics in 1976 he obtained in 1979 the Ph. D. Hab. degree (Docteur es-Sciences Physiques) from the Université Pierre-et-Marie-Curie. He was one of the firsts in the world to develop Sol-Gel routes for advanced optoelectronic ceramics. Ph. Colomban studied superionic conductors' structure and ion mobility and worked as Consultant for the French Science and Technology Minister in charge of Passive Components and Materials for Electronics for many years. From 1989 to 1993 he was in charge of the new projects at the Materials Department of ONERA, the French Establishment for Aerospace Research and Development (Materials for rockets and missiles, aircraft engines, Sol-Gel routes, ceramic- or polymer-matrix composites, fibres, nanoparticle-based microwave absorbing materials and Functionally Graded composites...) and worked as Consultant for them for 10 further years. From 1994 to the present, as CNRS Research Professor his research interests include Materials Science and Raman, IR and neutron spectroscopies (in situ analysis, fuel cells, electrolysers, fibres/composites...). Attention is paid to the correlation between Raman parameters and mechanical and electrical (ionic, electronic) properties...as well to the identification of the technology used in ancient ceramics, glasses, textiles, paintings and building.

演講摘要:

Considering the chemical bond and its anharmonic potential well, we will show how the vibrational spectroscopy probes the mechanical behaviour of solid and why Raman microspectrometry is a good method to measure compressive and tensile stress at the nanoscale.1,2 Because the huge anharmonicity of the C-C bond, resonance Raman extensometry was first used to measure residual stress of carbon fibres embedded in polymer2-8 or ceramic matrices.9 The technique provides information on the fibre-matrix load transfer and on the Ineffective Length. Most of the studies deals with residual stress (static measurement) but some measurements have been made under controlled tensile strain.8 We will show that specific attention to the low wavenumber range inform on the intrinsic behaviour of the solid matter, especially before fracture of polymer materials with the example of synthetic and natural polymer fibres (polyamides (PA66), polyethylene terephthalate (PET), polypropylene (PP), poly(paraphenylene benzobisoxazole) (PBO), Kevlar, keratin/hair, silkworm and spider silks).10-15 The great advantage of the low wavenumber spectrum is the information provided both on crystalline and amorphous macromolecules. Bonding is very similar in the two cases but a broader distribution of conformations is observed for the amorphous macromolecules. We will describe the procedure (coupling between Raman spectrometer and tensile/compressive stage, control of the thermal effect, spectrum fitting ...) and discuss the modifications induced by the application of a tensile or compressive stress, including the effects of fatigue. The significant role of the 'amorphous' bonds/domains in the process of fracture/fatigue will be shown.12

1.Colomban Ph. Analysis of strain and stress in ceramic, polymer and metal matrix composites by Raman spectroscopy. Adv Eng Mater 2002, 4(8), 535–542.

2.Colomban Ph. Understanding the nano- and macromechanical behaviour, the failure and fatigue mechanisms of advanced and natural polymer fibres by Raman/IR microspectrometry. Adv. Nat. Sci.: Nanosci Nanotechnol 2013, 4, 013001.

3.Young RJ. Analysis of composites using Raman and fluorescence microscopy—a review. J Microsc 1996, 185(2), 199–205.

4.Vlattas C, Galiotis C. Monitoring the behavior of polymer fibres under axial compression. Polymer 1991, 32(10), 1788–1793.

5.Galiotis C. Laser Raman spectroscopy, a new stress/strain measurement technique for the remote and on-line nondestructive inspection of fiber reinforced polymer composites. Mater Tech 1993, 8(9/10), 203–209.

6.Beyerlein IJ, Amer MS, Schadler LS, Phoenix SL. New methodology for determining in situ fibre, matrix and interfaces stresses in damaged multifiber composites. Sci Eng Composite Mater 1998, 7(1/2), 151-204.

7.Schadler LS, Galiotis C. Fundamentals and applications of micro Raman spectroscopy to strain measurements in fibre reinforced composites. Inter Mater Rev 1995, 40(3), 116–134.

8.Colomban Ph, Gouadec G, Mathez J, Tschiember J, Peres P. Raman Stress Measurement in Opaque Industrial Cf-epoxy Composites submitted to controlled tensile strain. Composites Part A 2006, 37(4), 646-651.

9.Wu J, Colomban Ph. Raman spectroscopy study on the stress distribution in the continuous fibre reinforced ceramic matrix composites. J. Raman Spectrosc. 1997, 28(), 523-529.

10.Colomban Ph, Herrera Ramirez JM, Paquin R, Marcellan A, Bunsell A. Micro-Raman Study of the Fatigue and Fracture Behaviour of single PA66 Fibres. Comparison with single PET and PP fibres. Eng Fracture Mech 2006, 73(16), 2463-2475.

11.Paquin R, Limage M-H, Colomban Ph, Micro-Raman Study of PET Single Fibre under High Hydrostatic Pressure: Phase/Conformation Transition and Amorphisation. J. Raman Spectrosc. 38 (2007) 1097-1105.

12.Herrera-Ramirez JM, Colomban Ph, Bunsell A. MicroRaman Study of the Fatigue Fracture and Tensile Behaviour of Polyamide (PA66) Fibres. J. Raman Spectrosc. 2004, 35(12), 1063-1072.

13.Colomban Ph, Sagon G, Lesage M, Herrera-Ramirez JM. MicroRaman Study of the Compressive Behaviour of Polyamide (PA66) Fibres in a Diamond –Anvil Cell. Vibr Spectr 2005, 37(1) 83-90.

14.Colomban Ph, Dinh HM. Origin of the variability of the mechanical properties of silk fibres: II, the nanomechanics of single silkworm and spider fibres. J. Raman Spectrosc. 2012, 43(8), 1035-1041.

15.Colomban Ph, Jauzein V. Silk: fibres, films and composites – Processing, Structure and Mechanics, ch. 5, pp 137-183, in Handbook OF Tensile Properties of Textiles and Technical Fibres, 2nd Edition, A.R. Bunsell Ed., Woodhead Publishing Ltd CRC Press, Oxford 2018.

2018-3-26-1