A. B. Ankudinov, V. A. Zelenskii, N. P. Cherezov, V. S. Erasov, I. V. Saikov, M. I. Alymov
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Effect of Porosity on the Elastic Modulus of the Compacts Made of a Titanium Powder Synthesized from Titanium Hydride
Abstract—The compressive properties of titanium having various degrees of porosity fabricated by powder metallurgy methods from a powder mixture of titanium hydride TiH2 and a pore forming agent (ammonium bicarbonate NH4HCO3) are studied. Sintering is performed in vacuum or argon at 1150 and 1200°C. A change in the volume fraction of ammonium bicarbonate from 0 to 60% is shown to control the porosity of titanium samples from 3 to 59%. The compressive elastic modulus of porous titanium is found to decrease from 50 to 4 GPa when the porosity increases from 3 to 59%. The sintering atmosphere and a change in the sintering temperature by 50°C are shown to insignificantly affect the elastic modulus: it changes by ≈10%.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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