In situ SEM micro-indentation of single wood pulp fibres in transverse direction

Adusumalli, Ramesh-Babu; Raghavan, Rejin; Schwaller, Patrick; Zimmermann, Tanja; Michler, Johann
October 2010
Journal of Electron Microscopy;Oct2010, Vol. 59 Issue 5, p345
Academic Journal
Fibre deformations such as kinks and micro-compressions are significant parameters in determining the quality of industrial pulps. Undoubtedly, very little information has been obtained so far on fibre deformation because it is very tedious to handle the specimens. In this study, a novel in situ scanning electron microscope (SEM) micro-indentation technique was adopted for the first time to study the deformation of single industrial pulp fibres in the transverse direction. A one-to-one correspondence between load drops in load–displacement curve and cell wall deformation was obtained by using the SEM video sequence recorded during micro-indentation. The cell wall deformation occurred by ‘elastic’ sinking-in and lateral bulging of the microfibrils. Finally, the critical load (stress) required to initiate a crack in the cell wall was measured for different unbleached pulp fibres.


Related Articles

  • In Situ Mechanical Testing Techniques for Real-Time Materials Deformation Characterization. Rudolf, Chris; Boesl, Benjamin; Agarwal, Arvind // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Jan2016, Vol. 68 Issue 1, p136 

    In situ mechanical property testing has the ability to enhance quantitative characterization of materials by revealing the occurring deformation behavior in real time. This article will summarize select recent testing performed inside a scanning electron microscope on various materials including...

  • Nanohardness of Sintered and Shock Deformed Alumina. Chakraborty, Riya; Dey, Arjun; Mukhopadhyay, Anoop; Joshi, Keshaw; Rav, Amit; Mandal, Ashok; Bysakh, Sandip; Biswas, Sampad; Gupta, Satish // Metallurgical & Materials Transactions. Part A;Feb2012, Vol. 43 Issue 2, p459 

    To understand how high-strain rate, flyer-plate impact affects the nanohardness of a coarse (~10 μm) grain, high-density (~3.978 gm cc) alumina, load controlled nanoindentation experiments were conducted with a Berkovich indenter on as-sintered disks and shock-recovered alumina fragments...

  • Instrumented nanoindentation and scanning electron transmission microscopy applied to the study of the adhesion of InP membranes heteroepitaxially bonded to Si. Pantzas, Konstantinos; Le Bourhis, Eric; Patriarche, Gilles; Itawi, Ahmad; Beaudoin, Grégoire; Sagnes, Isabelle; Talneau, Anne // European Physical Journal - Applied Physics;Feb2014, Vol. 65 Issue 2, p00 

    Instrumented nanoindentation and STEM have been combined ex situ to study the adhesion of 450 nm thick InP membranes to Si substrates. Three distinct regimes are identified in the deformation of the InP/Si stacks during these experiments: the first is plastic flow of InP at low loads; the second...

  • The Use of Coconut Fibre in the Production of Structural Lightweight Concrete. Hasan, Noor Md. Sadiqul; Sobuz, Habibur Rahman; Sayed, Md. Shiblee; Islam, Md. Saiful // Journal of Applied Sciences;2012, Vol. 12 Issue 9, p831 

    The high cost of conventional construction materials is a dominating factor affecting housing system around the world. This has necessitated research work into alternative materials in the construction field. The aim of this study was to investigate experimentation on physical and mechanical...

  • Yielding and Irreversible Deformation below the Microscale: Surface Effects and Non-Mean-Field Plastic Avalanches. Moretti, Paolo; Cerruti, Benedetta; Migue, M.Carmen // PLoS ONE;2011, Vol. 6 Issue 6, p1 

    Nanoindentation techniques recently developed to measure the mechanical response of crystals under external loading conditions reveal new phenomena upon decreasing sample size below the microscale. At small length scales, material resistance to irreversible deformation depends on sample...

  • Growth and Deformation Structure of Gradient and Layer-Gradient Ti-Al-Si-Cu-N Coatings. Ovchinnikov, Stanislav V.; Korotaev, Alexandr D.; Pinzhin, Yurii P. // AIP Conference Proceedings;2014, Vol. 1623, p463 

    The features of the growth structure and modification of gradient and layer-gradient Ti-Al-Si-Cu-N coatings in the areas of deformation and fracture during indentation and scratch testing were investigated using transmission and scanning electron microscopy methods. The influence of the...

  • THE AUTOMATIC TESTERS IN MICROHARDNESS MEASUREMENT AND ISE EFFECT. PETRÍK, Jozef; BELLA, Peter; GUZANOVÁ, Anna; SINAIOVÁ, Iveta // Annals of the Faculty of Engineering Hunedoara - International J;Aug2014, Vol. 12 Issue 3, p239 

    The measurement of micro-hardness with applied loads 0.09807 N, 0.24518 N, 0.49035 N and 0.9807 N has been carried out by five automaticmicrohardness testers. Each appraiser obtained readings of the tester which she/he normally operates. The influence of applied load and equipment on the...

  • Revisit of the two-dimensional indentation deformation of an elastic half-space. Fuqian Yang; Yang-Tse Cheng // Journal of Materials Research;Jun2009, Vol. 24 Issue 6, p10 

    The article discusses a study on two-dimensional (2D) indentation deformation of a half-space with elastic property. The confusion about the relations between load and displacement for 2D indentation is discussed. The study investigated the semianalytical relationship between the flat-ended...

  • Evaluation of strain rate sensitivity by constant load nanoindentation. Peykov, Daniel; Martin, Etienne; Chromik, Richard; Gauvin, Raynald; Trudeau, Michel // Journal of Materials Science;Oct2012, Vol. 47 Issue 20, p7189 

    Constant load measurements by nanoindentation offer the potential for measuring strain rate sensitivity from individual features and defects on a submicron scale. However, recent reports reveal a conflicting load dependence (both increasing and decreasing strain rate sensitivity with load) which...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics