Next Article in Journal
Design of Experiments-Assisted Development of Clotrimazole-Loaded Ionic Polymeric Micelles Based on Hyaluronic Acid
Next Article in Special Issue
Testing Novel Portland Cement Formulations with Carbon Nanotubes and Intrinsic Properties Revelation: Nanoindentation Analysis with Machine Learning on Microstructure Identification
Previous Article in Journal
Ultrasound-Assisted Hydrazine Reduction Method for the Preparation of Nickel Nanoparticles, Physicochemical Characterization and Catalytic Application in Suzuki-Miyaura Cross-Coupling Reaction
Previous Article in Special Issue
Structural and Electrical Comparison of Si and Zr Doped Hafnium Oxide Thin Films and Integrated FeFETs Utilizing Transmission Kikuchi Diffraction
Open AccessArticle

Anisotropy of Mechanical Properties of Pinctada margaritifera Mollusk Shell

1
Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 30-059 Krakow, Poland
2
Fraunhofer IKTS, Institute for Ceramic Technologies and Systems, 01109 Dresden, Germany
3
Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Krakow, Poland
4
Department of Strength and Fatigue of Materials and Structures, AGH University of Science and Technology, 30-059 Krakow, Poland
5
Department of Stratigraphy and Paleontology, University of Granada, 18071 Granada, Spain
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 634; https://doi.org/10.3390/nano10040634
Received: 23 February 2020 / Revised: 20 March 2020 / Accepted: 23 March 2020 / Published: 28 March 2020
(This article belongs to the Special Issue Characterization of Nanomaterials)
The mechanical properties such as compressive strength and nanohardness were investigated for Pinctada margaritifera mollusk shells. The compressive strength was evaluated through a uniaxial static compression test performed along the load directions parallel and perpendicular to the shell axis, respectively, while the hardness and Young modulus were measured using nanoindentation. In order to observe the crack propagation, for the first time for such material, the in-situ X-ray microscopy (nano-XCT) imaging (together with 3D reconstruction based on the acquired images) during the indentation tests was performed. The results were compared with these obtained during the micro-indentation test done with the help of conventional Vickers indenter and subsequent scanning electron microscopy observations. The results revealed that the cracks formed during the indentation start to propagate in the calcite prism until they reach a ductile organic matrix where most of them are stopped. The obtained results confirm a strong anisotropy of both crack propagation and the mechanical strength caused by the formation of the prismatic structure in the outer layer of P. margaritifera shell. View Full-Text
Keywords: mollusk shells; bivalve; calcite; nano-XCT; electron microscopy; mechanical properties mollusk shells; bivalve; calcite; nano-XCT; electron microscopy; mechanical properties
Show Figures

Figure 1

MDPI and ACS Style

Strąg, M.; Maj, Ł.; Bieda, M.; Petrzak, P.; Jarzębska, A.; Gluch, J.; Topal, E.; Kutukova, K.; Clausner, A.; Heyn, W.; Berent, K.; Nalepka, K.; Zschech, E.; Checa, A.G.; Sztwiertnia, K. Anisotropy of Mechanical Properties of Pinctada margaritifera Mollusk Shell. Nanomaterials 2020, 10, 634.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop