Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Table 3

The mechanical properties of the alumina-based ceramics.

Ceramics		Processing method	𝛾rel (%)	𝑑gr (𝜇m)	𝐸 (GPa)	𝐻𝑉 (GPa)	𝐾IC (MPa·m^0,5)	Δ𝑑/𝑑 (%)
Alumina	AO	MPC + sintering	97	2.5	386	18.9	5.8	0
	AO13Al		98	1.7	364	19.4	6.2	0.3
	AO25Al		97	0.8	332	18.7	5.4	0.5
	AlOx	HP	95	2.2	292	16.0	5.4	—
Composite	AlOxZ		97	0.8	316	16.9	5.0	—
	AlOxT		96	0.5	412	20.1	4.4	—

Here, 𝛾_rel: relative density; 𝑑_gr: average grain size; 𝐸, 𝐻_𝑉, and 𝐾_IC: Young’s modulus, microhardness, and fracture toughness of the ceramics, correspondingly; Δ𝑑/𝑑: microdistortion of the crystalline lattice.