Structural Features of Cold-Pressed Heterogeneous Powder Materials with a Ductile Matrix and Rigid Inclusions

• Published in: Powder metallurgy and metal ceramics Vol. 55; no. 9-10; pp. 541 - 551
• Main Author: Epifantseva, T. A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2017; Springer; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cold pressing; Compacts; Composites; Densification; Glass; Inclusions; Materials Science; Metallic Materials; Microstructure; Natural Materials; Parameters; Particle size; Powder compacts; Powders (Particulate matter); Sintered Metals and Alloys; Strength; compacts; matricity; process strength; heterogeneous powder material
• ISSN: 1068-1302; 1573-9066
• DOI: 10.1007/s11106-017-9837-0

The paper proposes principles for controlling the microstructural parameters of cold-pressed heterogeneous Cu–W materials to reach the process strength and high energy reserve of the products. It is found that decrease in the matrix–inclusion particle size ratio increases the density of heterogeneous compacts. It is shown that the theory for controlling the microstructure of porous bodies can be applied to assess the structure-sensitive properties of the test materials using calculation of the composite matricity parameter. The effectiveness of this approach to predict the process strength of compacts is demonstrated. The principles for reaching the process strength of green heterogeneous powder compacts by considering the particle size ratio of the mixture components, volume fraction of the particles, and size of inclusions are addressed.