title: Enhancement of Triboluminescence in the Presence of CO2 by Sliding between Silica and Yttria-Stabilized Zirconia.
abstract: Triboluminescence (TL) has gained increasing attention in the past two decades due to its potential for many applications such as an in situ damage sensor, X-ray source, spectroscopic probe, and optical switch. So far the mechanisms by which TL is excited are not well understood. We have investigated the TL emitted during the sliding contact between silica wafer and YSZ (yttria-stabilized zirconia) wafers in CO2 gas, ambient air, and vacuum. We discovered that the mean intensity of photons emitted in CO2 gas is nearly a hundred times stronger than that in air. TL induced in the sliding experiment is proposed to be due to a combination of chemical luminescence, impurities and vacancies luminescence. In addition, the intensity of the light emission of YSZ may be controlled by changing the concentration of CO2 gas.
authors.affiliation: †State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Kuifang
authors.initials: K
authors.lastname: Wang
authors.affiliation: †State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Liran
authors.initials: L
authors.lastname: Ma
authors.affiliation: ‡School of Technology, Beijing Forestry University, Beijing 100083, China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Xu
authors.affiliation: †State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Shizhu
authors.initials: S
authors.lastname: Wen
authors.affiliation: †State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Yirui
authors.initials: Y
authors.lastname: Zhang