Microstructural Features and Mechanical Properties of In Situ Formed ZrB₂/Cu Composites

Abstract

In situ reinforced copper matrix composites with improved mechanical properties are promising materials for various applications. In this work, an attempt has been made to explore the microstructural features and properties of in situ formed ZrB 2 /Cu composites using a liquid metallurgy route. XRD, SEM, XPS, and TEM analysis were used for micro-structural characterization. The results showed that ZrB 2 particles could form through the reaction of Zr and B in molten Cu. The obtained composites consisted of hexagonal shaped ZrB 2 and Cu(Zr) solid solution matrix. The in situ ZrB 2 /Cu composites exhibited improved microhardness. However, the electrical conductivity decreased with increasing weight fractions of ZrB 2 .

A new method for solid‐state diffusion of boron atoms into powders of a multicomponent carbide

“…The components at 179.28 and 181.32 eV are related to the Zr–C bonds, while the components at 182.82 and 185.10 eV are ascribed to the Zr–O bonds . The binding energy of Zr–B bond is 178.01 eV . Simultaneously, Ti–C bonds (455.36 eV) and Ti–O bonds (455.67 and 459.03 eV) are present on the surface of ZTCB specimen (Figure C).…”

In-situ synthesis of ultra-fine ZrB2–ZrC–SiC nanopowders by sol-gel method

“…From the XPS fitting spectra of Zr 3d in Fig. 6(b), the peaks centered at around 177, 180 and 182 eV correspond to Zr-C, Zr-B and Zr-O bonds [33][34][35], respectively, confirming the small amount of ZrO 2 residue. In the Si 2p XPS spectra (Fig.…”

Effect of Crystallization Temperature on the Microstructures and Mechanical Properties of Enamel Substrate RT330

“…As we known, the strengthening mechanism of materials mainly contains solid solution strengthening and alloying, transformation hardening, grain boundary strengthening, and precipitation strengthening . In the crystallization treatment, there was no change in the chemical composition of RT330 enamel substrate.…”