TY - JOUR
T1 - Evaluation of elastic/mechanical properties of some glasses and nanocrystallized glass by cube resonance and nanoindentation methods
AU - Torres, F.
AU - Benino, Y.
AU - Fujiwara, T.
AU - Komatsu, T.
N1 - Funding Information:
This work was supported with a Grant of Nippon Sheet Glass Foundation for Materials Science and Engineering, and a Grant-in-Aid for Scientific Research form the Ministry of Education, Science, Sports and Culture, Japan, and the 21st Century Center of Excellence (COE) Program in Nagaoka University of Technology.
PY - 2004/8/3
Y1 - 2004/8/3
N2 - Elastic and mechanical properties of 10La2O 3·30Bi2O3·60B2O 3 (LaBiB) glass, 15K2O·15Nb2O 5·68TeO2·2MoO3 (KNbTeMo) glass and a transparent KNbTeMo nanocrystallized (particle size: ∼40nm) glass were examined using cube resonance and nanoindentation methods. The values of Poisson's ratio, Young's modulus (E), Debye temperature (θD), fractal bond connectivity, Martens hardness, indentation hardness, indentation Young's modulus, elastic recovery, Vickers hardness, fracture toughness (K c) and brittleness for the samples were evaluated, and the relation with the structure and nanocrystallization were clarified. LaBiB glass containing high oxygen-coordinated La3+ ions and two-dimensional BO3 structural units shows excellent properties of E=90.6GPa, θD=404K and Kc=0.72MPam1/2 and a high resistance against deformation during Vickers indentation. KNbTeMo glass with the three-dimensional network structure and consisting of weak Te-O bonds has small values of E=51.4GPa and Kc=0.29MPam1/2. It was demonstrated that the elastic and mechanical properties of KNbTeMo precursor glass are largely improved by nanocrystallization, e.g., E=69.7GPa and K c=0.32MPam1/2. The nanocrystallization also induces a high resistance against deformation during Vickers indentation.
AB - Elastic and mechanical properties of 10La2O 3·30Bi2O3·60B2O 3 (LaBiB) glass, 15K2O·15Nb2O 5·68TeO2·2MoO3 (KNbTeMo) glass and a transparent KNbTeMo nanocrystallized (particle size: ∼40nm) glass were examined using cube resonance and nanoindentation methods. The values of Poisson's ratio, Young's modulus (E), Debye temperature (θD), fractal bond connectivity, Martens hardness, indentation hardness, indentation Young's modulus, elastic recovery, Vickers hardness, fracture toughness (K c) and brittleness for the samples were evaluated, and the relation with the structure and nanocrystallization were clarified. LaBiB glass containing high oxygen-coordinated La3+ ions and two-dimensional BO3 structural units shows excellent properties of E=90.6GPa, θD=404K and Kc=0.72MPam1/2 and a high resistance against deformation during Vickers indentation. KNbTeMo glass with the three-dimensional network structure and consisting of weak Te-O bonds has small values of E=51.4GPa and Kc=0.29MPam1/2. It was demonstrated that the elastic and mechanical properties of KNbTeMo precursor glass are largely improved by nanocrystallization, e.g., E=69.7GPa and K c=0.32MPam1/2. The nanocrystallization also induces a high resistance against deformation during Vickers indentation.
KW - A. Nanostructures
KW - C. Ultrasonic measurements
KW - D. Elastic properties
KW - D. Mechanical properties
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U2 - 10.1016/j.materresbull.2004.04.026
DO - 10.1016/j.materresbull.2004.04.026
M3 - Article
AN - SCOPUS:3042814307
SN - 0025-5408
VL - 39
SP - 1431
EP - 1443
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 10
ER -