Mechanical Behaviour and Fracture Mechanics of Praseodymium Modified Lead Titanate Ceramics Prepared by Solid-State Reaction Route

Table 2

Data on microhardness measurements and analysis for various compositions of PrPT ceramics.

Pr composition	𝑛𝑘^∗	𝑛ℎ^∗∗	𝐾1 (GNm^−2)	𝐾2 (GNm^−2)	𝑊 (N)
4 mole%	1.86±03	1.95±04	5.3	3.2	0.067
6 mole%	1.84±03	1.92±03	5.9	3.3	0.12
8 mole%	1.86±03	1.95±03	7.9	5.2	0.60
10 mole%	1.85±03	1.93±03	8.7	6.2	0.47

𝑛_𝑘^∗ represents the value of Mayer’s index “𝑛” on operation of Kick’s law (𝑃=𝐾₁𝑑^𝑛).
𝑛_ℎ^∗∗ represents the value of Mayer’s index “𝑛” on operation of Hays and Kendall’s law (𝑃−𝑊) = 𝐾₂𝑑².