WP4

Introduction

WP4 targets the advanced characterisation and testing of ATF clads/joints with respect to the in-service stability of performance-defining interfaces (fibre/matrix interface in SiC/SiC, coating/substrate interface) and 3D evolution of damage. The produced experimental data will be used to assess the performance of the ATF clads & joints with respect to the material property requirements set at the project outset (WP10) and to also predict changes in material performance during service; the latter will be achieved by using data acquired in WP4 as input for the multiscale modelling activities in WP9.

The development of robust models capable of predicting in-service material performance depends on both model accuracy and data reliability; thus, collecting reliable key data is an important objective for WP4. All critical interfaces will be characterised on the nanoscale by advanced characterisation techniques (APT, 3D EBSD, STEM, HRTEM) in the as-fabricated state, after interaction with the coolant (WP5) and ion/proton irradiation (WP6).

Additional material characterisation includes micro-pillar testing of ceramic coatings (MAX phases, oxides) in the SEM up to 600°C, interfacial shear strength of coated clads, dynamic elastic properties of sufficiently thick coatings up to 1700°C, neutron radiography to detect hydrogen uptake, µXCT to monitor the 3D evolution of damage in ATF clads, etc.

Deliverables

• D4.1: Advanced characterisation of ATF clads & joints prior to BR2 irradiation
• D4.2: Advanced characterisation of proof-of-concept ATF clads/joints