Figure 3.

Vickers hardness and fracture toughness of PMNT/ZnO ceramics. The upper line indicated the relation of Vickers hardness and ZnO content. The other lower line indicated the relation of fracture toughness and ZnO content.

Promsawat et al. Nanoscale Research Letters 2012 7:65   doi:10.1186/1556-276X-7-65
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