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Preparation and Interface Investigation of Fe/Al 2 O 3P Composite Activated by Ni and Ti
Author(s) -
Tang Shuli,
Gao Yimin,
Li Yefei,
Zheng Qiaoling
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600302
Subject(s) - materials science , composite number , composite material , porosity , sintering , ceramic , abrasive , compressive strength , metallurgy
Ceramic particles preforms are synthesized by vacuum sintering reaction between Al 2 O 3 particles and active elements Ti and Ni. The surface of preforms sintered by Al 2 O 3 and Ti consists of block‐shaped a‐Ti and fibrous TiO. As the content of Ti in preforms increases, the compressive strength of preforms rises first and then falls and the porosity decreases gradually. The preforms sintered of Al 2 O 3 and Ni–Ti have much higher compressive strength, because of the compact sintered shell outside Al 2 O 3 and the sintered necks between particles. Then the preforms/high‐Cr cast iron composite is fabricated by infiltration casting process. The three‐body abrasive wear resistance of composite is over 12 times higher than Cr15, owing to the protection of extruded Al 2 O 3 and tightly bonded composite interface.