Table 1 also shows that the expansions in thickness at 900 C,
800 C and 700 C are 3.14%, 4.05% and 4.03% respectively. The
variations of expansions in thickness closely mirror those of the deuterium absorption amounts, as is shown in Fig. 2. This implies
that samples with greater amounts of deuterium lead to larger
expansion and as a consequence result in cracking more often.