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Sintering experiments on boron carbide (B4C) are performed by hot pressing (HP) and spark plasma sintering (SPS). Results show that the maximum densification rate of SPS occurs at approximately 1850°C, which is earlier than that of HP. The microstructure of samples sintered by HP is very homogeneous and has a relative density of about 91%. In SPS, a high relative density of >94% can be realised,...
Effects of pressure, from ordinary (30MPa) to high pressure (110MPa), on densification behaviour, microstructures and mechanical properties of boron carbide ceramics sintered by hot pressing are investigated. With increasing pressure, the relative density sharply increases within 30–75MPa, slowly increases within 75–100MPa and finally stagnates. For samples within 75–100MPa, densification begins at...
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