Electroerosion resistance and structural phase transformations in electrospark and laser deposition of titanium alloys using composite ceramics based on ZrB2-ZrSi2 and TiN-Cr3C2 systems.

Autor: I. Podchernyaeva, A. Panasyuk, V. Panashenko, O. Grigor’ev, V. Kayuk, V. Stetsenko, A. Bloshchanevich
Předmět:
Zdroj: Powder Metallurgy & Metal Ceramics; Jan2008, Vol. 47 Issue 1/2, p116-123, 8p
Abstrakt: Abstract  The paper examines the mass transfer kinetics, structure, phase and chemical compositions, and micromechanical properties of electrospark and laser coatings on titanium alloys (including their combination) deposited using composite materials based on the ZrB2-ZrSi2 and TiN-Cr3C2 systems. The electrospark deposition of both materials is characterized by a relatively high mass-transfer coefficient (∼40–60%) over a wide range of treatment time t ≥ 1 min/cm2. It is determined that after prolonged electrospark deposition (t = 7 min/cm2), ZrB2-ZrSi2 coatings have structurally heterogeneous surface with smoothed Ti-alloy localities caused by the melt crystallization and modified with alloying components. It is shown that ZrB2-based coatings are promising along with conventional wear-resistant coatings based on refractory titanium compounds. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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