China 
Africa 
Explore chapters and articles related to this topic
Granular Materials Powder Metallurgy
Published in Leo Alting, Geoffrey Boothroyd, Manufacturing Engineering Processes, 2020
Lubrication can be provided as internal or external lubrication. In internal lubrication, a lubricant (zinc stearate or stearic acid, 0.25–1% by weight) is mixed with the powder, increasing its compressibility and decreasing its green strength. After pressing, the lubricant is driven out by heat treatment (in air at 375−425°C), before sintering in a controlled atmosphere. In external lubrication, only the die walls are lubricated, avoiding the heat treatment necessary to drive out the lubricant, but this method does not provide the improved flow and compaction properties.
Structure and Properties of Polymer Composites Based on Statistical Ethylene-Propylene Copolymer and Mineral Fillers
Published in Omari V. Mukbaniani, Tamara N. Tatrishvili, Marc J. M. Abadie, Science and Technology of Polymers and Advanced Materials, 2019
N. T. Kahramanov, N. B. Arzumanova, I. V. Bayramova, J. N. Gahramanly
Zinc stearate (C17H35COO)2Zn - white amorphous powder, melting point is 403K, used concentration 0.3–1.0 wt%, used as the lubricant agent in the processing of polymers by injection molding and extrusion.
Experimental study of size effect on quasi-static strengths for short glass fibre-reinforced plastics
Published in Advanced Composite Materials, 2018
Takahiko Sawada, Takayuki Kusaka
Table 1 lists the specifications of the SGP material. Bulk plates of SGP (area: 300 mm2, thickness: 30 mm) with Vf of 0, 20, and 50% were fabricated using the compression moulding process. Thermosetting phenolic resin was used as the matrix (Hitachi Chemical Co., Ltd.). The reinforcement was a short E-glass fibre with a length of 10 mm and a diameter of 10 μm (Nittobo Co., Ltd.). Compression moulding was carried out using a moulding machine with a mould temperature of 160 °C, a mould pressure of 20 MPa and a curing time of 250 s. Zinc stearate was compounded in order to improve the lubrication and wear resistance for the applications of belt pulley and gear products.