Peculiarities of Structure State and Mechanical Characteristics in Ion-Plasma Condensates of Quasibinary System Borides W2B5-TiB2

• Published in: Science of sintering 2006-01, Vol.38 (1), p.63-72
• Main Authors: Sobol, O V, Grigoryev, O N, Kunitsky, Yu A, Dub, S N, Podtelezhnikov, A A, Stetsenko, A N
• Format: Article
• Language: English
• ISSN: 0350-820X
• DOI: 10.2298/S0S0601063S

In order to create high-durable, wear-resistant materials for a wide range of functional applications, comparative investigations of the structure and mechanical characteristics of ion-plasma Ti-W-B nano-crystalline condensates were carried out. The range of condensation rates 0.11-#0.25nm/s was found to be critical for the coatings obtained from the target with 80 vol% W2B5- 20 vol% TiB2. Below this, a phase with a cubic lattice (W, Ti)B0.7 .1.2(0,N,003 02 formed, while over this range, a solid solution (W,Ti)B2 with a hexagonal lattice and element composition close to the sputtered target was observed. The structure state of the material changed from cluster-crystalline (under low sputter potentials U=0.6..1.0 kV) to textured- crystalline (under U > 2.2 kV). Structure perfection improvement with U increase results in higher hardness and elastic modulus of condensates. The conditions of cluster component formation and its effect on hardness and elastic modulus of condensates are discussed.