NDLI: Fabrication and Properties of Reactively Hot Pressed HfB 2-HfC Ultra-High Temperature Ceramics

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Fabrication and Properties of Reactively Hot Pressed HfB 2-HfC Ultra-High Temperature Ceramics

Content Provider	Semantic Scholar
Author	Lee, Seung Joon Seong, Y. Baek, Seungsu Kang, Eul Son Kim, Do Kyung
Copyright Year	2010
Abstract	HfB 2 -HfC composites were prepared by reactive hot pressing using Hf and B 4 C at temperatures of 1800 and 1900oC for 60 min under 32 MPa in an Ar atmosphere. The reaction sequences of the HfB 2 -HfC composite were studied through series of pressureless heat treatments ranging from 800 to 1600oC. The effect of size reduction of the starting powders on densification was investigated by vibration milling. Fully dense HfB 2 -HfC composites were obtained by size reduction of the starting powders via vibration milling. The oxidation behaviour of the HfB 2 -HfC composites at 1500oC in air showed formation of a non-protective HfO 2 scale with linear mass gain. Examination of the mechanical properties showed that particle size reduction via vibration milling also led to improved flexural strength, hardness and fracture toughness.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://mse2.kaist.ac.kr/~ncrl/pub/2010_Fabrication%20and%20Properties%20of%20Reactively%20Hot%20pressed%20HfB2-HfC%20Ultra%20High%20temperature%20ceramcis.pdf
Language	English
Access Restriction	Open
Subject Keyword	3-Mercaptopropionic Acid Ceramics Hafnium Hybrid fibre-coaxial Hybrid fibre-optic Kinetics Internet Protocol Maxima and minima Multistage interconnection networks Oxygen Parabolic antenna Particle Size Powder dose form Specific Gravity Torch oxidation
Content Type	Text
Resource Type	Article

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