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Crystals 2018, 8(10), 385; https://doi.org/10.3390/cryst8100385

Dynamic Fracture Mechanism of Quasicrystal-Containing Al–Cr–Fe Consolidated Using Spark Plasma Sintering

1
School of Mechanical Engineering, Jiang Su University, 301 Xuefu Road, Zhenjiang 212013, China
2
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
3
School of Mechatronical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, China
4
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Authors to whom correspondence should be addressed.
Received: 15 August 2018 / Revised: 28 September 2018 / Accepted: 8 October 2018 / Published: 10 October 2018
(This article belongs to the Collection Structure and Properties of Quasicrystals)
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Abstract

The potential applications of quasicrystals (QCs) in automotive and aerospace industries requires the investigation of their fracture and failure mechanisms under dynamic loading conditions. In this study, Al–Cr–Fe powders were consolidated into pellets using spark plasma sintering at 800 °C for 30 min. The microhardness and dynamic failure properties of the samples were determined using nanoindentation and split-Hopkinson pressure bar technique, respectively. Scanning electron microscopy and transmission electron microscopy were employed to analyze fracture particles. The dynamic failure strength obtained from the tests is 653 ± 40 MPa. The dynamic failure process is dominated by transgranular fracture mechanisms. The difficulty in the metadislocation motion in the dynamic loading leads to the high brittleness of the spark plasma sintered (SPSed) Al–Cr–Fe materials. View Full-Text
Keywords: quasicrystals; spark plasma sintering; microstructures; fracture; transmission electron microscopy quasicrystals; spark plasma sintering; microstructures; fracture; transmission electron microscopy
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Li, R.; Wang, Z.; Li, Z.; Khor, K.A.; Dong, Z. Dynamic Fracture Mechanism of Quasicrystal-Containing Al–Cr–Fe Consolidated Using Spark Plasma Sintering. Crystals 2018, 8, 385.

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