Contactless flash sintering based on cold plasma. (15th January 2020)

• Record Type: Journal Article
• Authors: Dong, Jian; Wang, Ziang; Zhao, Xiang; Biesuz, Mattia; Saunders, Theo; Zhang, Zhengquan; Hu, Chunfeng; Grasso, Salvatore
• Is Part Of: Scripta materialia. Number 175(2020)
• Page Start: 20
• Page End: 23
• Publication Date: 2020-01-15
• Subjects: Cold plasma -- Flash sintering -- Contactless -- Zirconia -- Sintering; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.08.039
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report on flash sintering using a contactless approach. The process is based on dielectric barrier discharge atmospheric cold plasma which allows flash sintering without external preheating. The evenly spread cold plasma plume contributed to homogenous densification of zirconia samples, instead arc discharge resulted in un-sintered and cracked material. Final density and grain size could be controlled by adjusting current and discharge time. A 7 mm diameter disc was sintered up to 99% in 30 s by passing a current of 15 mA (0.39 mA/mm 2 ). The proposed technique is industrially scalable and offers a reliable replacement to platinum electrodes. Graphical abstract: Unlabelled Image