SCIENCEscience.org 4 FEBRUARY 2022¥VOL 375 ISSUE 6580 555
Fig. 4. Deformation and failure modes in ATE.(AtoC) SEM images
taken from in situ three-point bending tests. (D) Schematic illustration of the
crack deflection of ATE during the three-point bending test. (E) Enlarged
image taken from the red boxed area in (B). (E 1 andE 2 ) Enlarged SEM
images taken from the yellow boxed area and the orange boxed area in (E),
respectively, showing crack bridging and nanowires pulling up. Scale bar,
E 1 andE 21 mm. (FandG) SEM images of the permanent deformation
zone of ATE and enamel after nanoindentation, where the yellow arrows
refer to the crack deflection route and the orange arrows refer to the
interface delamination.RESEARCH | REPORTS