The authors regret that an average grain size, and maximum grain size, reported in the above paper were incorrect. The average grain size for ZrB2 in weldment-2 of the manuscript was reported as 52.4 ± 53.2 μm and should be 27.7 ± 22.1 μm. The maximum ZrB2 grain size in weldment-2 was also reported to be 225.9 μm and should be 148.6 μm. The incorrect average grain size was reported in the Abstract on page 3549 and in the Results and Discussion on page 3554. The incorrect maximum grain size was reported in the Results and Discussion on page 3554. The large standard deviation of the ZrB2 grain size in weldment-2 was also discussed, on page 3554, as “… ~17% of the distribution was found to be over 100 μm in diameter.”, rather, those grains were found to be over 45 μm in diameter.

The authors would like to point out that these errors do not change any of the conclusions preceding, or following, the discussion.

The authors would like to apologise for any inconvenience caused.