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Nanophase and superfine cemented carbides processed by powder injection molding
Two commercial superfine and one innovative nanophase cemented carbide powders were investigated. They cover straight and complex grades of cemented carbides. The nanophase cemented carbides are characterized by a combination of high hardness and strength. However, the nanophase cemented carbides do not have a favorable moldability. The as-received nanophase particles are agglomerated hollow balls. Therefore, the as-received nanophase powder was treated by milling to form particles suitable for injection molding. Even so, manufacture of nanophase cemented carbides via PIM (powder injection molding) is highly challenging. Several processing parameters affect the success, including powder moldability, binder chemistry, mixture homogeneity, molding parameters, debinding cycle and sintering densification level. The investigation focused on binder-related factors, including binder chemistry, binder-powder compatibility, feedstock preparation, molding conditions, and binder removal after molding.
Nanophase and superfine cemented carbides processed by powder injection molding
Two commercial superfine and one innovative nanophase cemented carbide powders were investigated. They cover straight and complex grades of cemented carbides. The nanophase cemented carbides are characterized by a combination of high hardness and strength. However, the nanophase cemented carbides do not have a favorable moldability. The as-received nanophase particles are agglomerated hollow balls. Therefore, the as-received nanophase powder was treated by milling to form particles suitable for injection molding. Even so, manufacture of nanophase cemented carbides via PIM (powder injection molding) is highly challenging. Several processing parameters affect the success, including powder moldability, binder chemistry, mixture homogeneity, molding parameters, debinding cycle and sintering densification level. The investigation focused on binder-related factors, including binder chemistry, binder-powder compatibility, feedstock preparation, molding conditions, and binder removal after molding.
Nanophase and superfine cemented carbides processed by powder injection molding
Yang, M.J. (author) / German, R.M. (author)
1998
11 Seiten, 9 Bilder, 10 Tabellen, 12 Quellen
Article (Journal)
English
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