Abstract
High-temperature thin-film sensors(TFSs)often suffer from inadequate tolerance to elevated tem-peratures.In this study,an innovative approach is pre-sented to fabricate in situ integrated TFSs with a core-shell structure on alloy components using coaxial multi-ink printing technique.This method replaces traditional layer-by-layer(LbL)deposition and LbL sintering processes and achieves simplified one-step manufacturing.The coaxial TFS includes a conductive Pt core for conducting and sensing and a dielectric shell for electrical isolation and high-temperature protection.The coaxial Pt resistance grid demonstrates excellent high-temperature stability,with a resistance drift rate of only 0.08％·h-1 at 800 ℃,signifi-cantly lower than traditional Pt TFSs.By employing this method,a Pt thin-film strain gauge(TFSG)is fabricated that boasts remarkable high-temperature electromechanical properties.This effectively addresses the problem of sen-sitivity degradation experienced by traditional LbL Pt TFSGs when subjected to high temperatures.We demon-strate the system integration potential of the technique by printing and verifying the functionality of a long-path thin-film resistance grid on turbine blades,which can withstand butane flame up to～1300 ℃.These results showcase the potential of core-shell structure of the coaxial TFS for high-temperature applications,providing a novel approach to develop high-performance TFS beyond traditional mul-tilayer structure.
基金项目
Shenyang Engine Design and Research Institute(JC3602007026)
维普
万方数据