Akademik Veri Yönetim Sistemi
İnternational Boron Symposium BORON-2022, İstanbul, Türkiye, 5 - 07 Ekim 2022, ss.206-207
Refractory metal borides are classified as advanced technology boron products with their
superior properties, such as high refractoriness, wear resistance, corrosion resistance, high
hardness and high fracture toughness. ZrB2 is one of the leading materials in this class with its
various properties. It has applications in various fields, such as the aerospace, aerospace and
metallurgical industries (Kauffman, 1965). It is one of the leading materials in the high
temperature ceramics group with its high melting temperature, high thermal conductivity,
thermal shock resistance, low thermal expansion coefficient, high-temperature resistance and
stability in extreme environments. These features make ZrB2 a potential candidate for critical
systems requiring thermal protection, such as hypersonic flights, atmosphere entry system and
rocket thrusters (Sonber, 2011). In the study, ZrB2 coatings were produced on copper (Cu)
substrates at different temperatures by using the specially developed CVD-based gas phase
coating technique. CVD is a method used to synthesize pure products at low temperature
compared to other coating and powder production methods. Chlorides and hydrogen gases are
among the most preferred reducing agents in CVD systems. The gas phase reactants were
selected as in Reaction 1 (Pierson, 1999).
ZrCl4+2 BCl3+5 H2→ZrB2+10 HCl (1)
In the present study, ZrB2 refractory boride coatings were produced as a high purity coating
from the gas phase using a specially developed reactor and process design (Bolluk, 2015).
Phase analyzes of the samples were made with XRD, morphology and section analyzes were
made with SEM-EDS.