High-pressure hydrogen materials compatibility of piezoelectric films

摘要

Hydrogen is well known for materials compatibility issues, including blistering and embrittlementnin metals, which are challenges for its use as the next-generation “green” fuel. Beyond metals,nhydrogen also degrades piezoelectric materials used as actuators used in direct injection hydrogenninternal combustion engines. We present the materials compatibility studies of piezoelectric films innhigh-pressure hydrogen environments. Absorption of high-pressure hydrogen and compositionnchanges were studied with an elastic recoil detection analysis and Rutherford back-scatteringnspectrometry in lead zirconate titanate and barium titanate thin films. Hydrogen surface degradationnin the form of blistering and Pb mixing was also observed. © 2010 American Institute of Physics.nu0004doi:10.1063/1.3517445