TITANIUM-BORIDE COMPOSITES

摘要

Alloy properties and phase constitutions for ternary Ti-Al-B and Ti-B-X, quaternary Ti-10 at.% Al-B-Jf (where X = Si, Ge, Sn, Zr, V, or Nb) and some multi-component alloys were investigated on alloys prepared by arc melting. As-cast and annealed samples were studied by metallography, electron probe microanalysis, XRD, DTA, Vickers hardness at temperatures up to 800℃, and compression and bend tests. Phase equilibria in the Ti-rich portions of the systems were studied in the two-phase (Ti) + (TiB) and conjugate three-phase fields. Based on the experimental data obtained, contributions of alloying additions to the mechanical properties are estimated and discussed for eutectic alloys.