Abstract
In this article the PIM (Powder Injection Moulding) technology is described in brief. After that the benefits and advantages were analyzed and summarized. Ceramic injection moulding (CIM) process was analyzed in more detail: CIM- alumina, CIM-zirconia and CIM ferrites as the most common technical ceramics in CIM ceramic parts production, medical applications and accessories in chemical laboratories, and cores in electronic inductive components. After that our results for CIM barium hexaferrite and piezo ceramics (barium titanate) are given. The main powder characteristics, the shrinkage and density and the main electrical characteristics of the sintered samples were compared for the isostatically pressed PM (powder metallurgy) and CIM formed samples. SEM fractographs of CIM and PM samples are given for CIM green parts, debinded (white) parts and sintered parts, and PM green parts and sintered parts. The results obtained were compared to literature data before they were applied in ceramic components production.
Highlights
Powder injection moulding (PIM) is a net-shaping process, which enables the production of parts of complex shapes in highly automatised production processes
A small gear, our first isotropic Magneto-PIM product of Ba hexaferrite is shown in fig. 6 (e): green part left and sintered part right
Experiments were started with ceramics and sensor materials: ferrites and PZT ceramics using the Ceramic injection moulding (CIM) procedure
Summary
PIM (powder injection moulding) is a net-shaping process, which enables the production of parts of complex shapes in highly automatised production processes. PIM allows the fabrication of unique geometric structures that are difficult to produce with other metal-working technologies. PIM combines the techniques of plastic injection moulding and powder metallurgy, including sintering. The main process consists of four steps: such as feedstock preparation, injection moulding (green samples forming), debinding (binder removing) procedure and the sintering process. PIM is a metal and ceramic shaping procedure, using a feedstock of composite granulate. The feedstock is prepared by mixing metal or ceramic powders with plastificators such as wax, thermoplastics, silicone, agar-agar etc.
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