公开(公告)号：US20210254221A1

公开(公告)日：2021-08-19

申请号：US16952233

申请日：2020-11-19

Applicant: ROLLS-ROYCE plc

Inventor： James G. BREWSTER ,  Christine CHALK ,  Matthew C. APPLETON

IPC: C23C28/00 ,  C23C14/08 ,  C23C14/04 ,  C23C14/54 ,  F01D5/28 ,  C23C14/24

Abstract: The present disclosure relates to a thermal barrier coating for coating a substrate. The thermal barrier coating may comprise an inner ceramic layer (e.g. 7YSZ) having a columnar grain structure and a first outer ceramic layer (e.g. 7YSZ) having a branched grain structure. The thermal barrier coating further comprises a nucleation layer (which may comprise alumina or tantala), interposed between the inner ceramic layer and the first outer layer. The layers can be deposited by PVD using substantially contact deposition parameters because the nucleation layer induces branching in the first outer ceramic layer.