Slow crack propagation in Y-TZP/metal composites |
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| Affiliation: | 1. Department of Energy Conversion and Storage, Technical University of Denmark, 4000 Roskilde, Denmark;2. Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Marie-Curie-Str. 17, 07623 Hermsdorf, Germany;1. Lobachevsky State University of Nizhny Novgorod, 23 Gagarina av., 603950 Nizhny Novgorod, Russian Federation;2. All-Russian Research Institute of Chemical Technology, 33 Kashirsk Highway, 115409 Moscow, Russian Federation;1. Division of Chemistry and Biotechnology, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tushima-naka, Kita-ku, Okayama 700-8530, Japan;2. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan |
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| Abstract: | The paper presents results of investigation on slow crack propagation of two composites in TZP/metal system, where 10 vol.% of tungsten and molybdenum were used as dispersed phase. The mean grain size of the inclusions was about 2 μm. Composites were prepared by intensive attrition milling/mixing of the constituent phases in ethyl alcohol and densified by hot-pressing at 1500 °C under 25 MPa in argon atmosphere. Strength, fracture toughness and hardness were investigated. The threshold value (KI0) of slow crack propagation is higher for both composite materials when compared with TZP. Both investigated composites show similar KI0 values and maximum values of the critical stress intensity factor (KIc) by using different methods. |
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