Zhenwen Yang

Area of research

Ceramics and Composites · Mechanical Engineering

Research interest

Research topics from publications: Densification and joining of a (HfTaZrNbTi)C high-entropy ceramic by hot pressing; Diffusion bonding of (Hf0.2Zr0.2Ti0.2Ta0.2Nb0.2)C high-entropy ceramic with metallic Ni foil; Interfacial characterization and mechanical properties of reactive air brazed ZrO2 ceramic joints with Ag–CuO–Al2TiO5 composite filler metal; Microstructural stability and mechanical properties of Al2O3/Kovar 4 J34 joint vacuum brazed using Ag-5Cu-1Al-1.25Ti (wt%) filler metal; Wetting of FeCoCrNiTi0.2 high entropy alloy on the (HfZrTiTaNb)C high entropy ceramic; Active brazing of (HfTaZrNbTi)C high-entropy carbide ceramic and Nb with Ti Ni composite interlayer: Novel findings on the reaction layer; Enhanced interfacial structure of (HfZrTiTaNb)C high-entropy ceramic joint brazed using FeCoCrNiTi0.2 alloy filler; Investigation of vacuum active brazing of (HfZrTiTaNb)C high-entropy carbide ceramic to Nb with TiZrCuNi filler alloy; Blackening Mechanism and Mechanical Properties Variation of Zirconia Ceramic Induced by Active Metal Brazing; Formation mechanisms and mechanical properties in aluminum cables and copper terminals ultrasonic welded joint. Representative work: Blackening of zirconia (ZrO 2 ) ceramics often occurs in active metal brazing, however, its discoloration mechanism and induced variation in mechanical properties remain unclear. Herein, ZrO 2 ceramic and Ti are successfully brazed by Ag–Cu–Pd filler in vacuum along with the blackening phenomenon. In the brazed joints, the reaction layers of TiO 2 + Ti 3 (Cu, Pd)O are formed adjacent to ZrO 2 , indicating that partial oxygen in ZrO 2 is taken by active Ti in the liquid filler that dissolved from the Ti substrate. Furthermore, the height of the blackened ZrO 2 ceramic near the brazing seam is in line with the amount of Ti content added to the filler, which infers that bulk‐sized black ZrO 2 c

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