Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa

Table 1

The relative percentages of changes in 𝑑²𝑃/𝑑ℎ² versus depth (ℎ) plots of Figure 4 along AB, BC and CD at a typical illustrative nanoindentation peak loads of 500 mN and 1000 mN for ARA, 6.5 GPa SA and 12 GPa SA samples.

Loads (mN)	Sample	AB (%)	BC (%)	CD (%)
	ARA	10.39	9.42	4.37
500	6.5 GPa SA	15.34	13.06	6.80
	12 GPa SA	34.38	30.55	17.24
	ARA	4.32	2.58	2.32
1000	6.5 GPa SA	14.32	10.71	7.68
	12 GPa SA	39.89	27.62	20.44