Shock wave recovery studies on structural and magnetic properties ofα—Fe₂O₃NPs

Comparative Assessment of Crystallographic Phase Stability of Anatase and Rutile TiO2 at Dynamic Shock Wave Loaded Conditions

“…As a consequence of this, shock wave induced research on crystalline as well as non crystalline materials has gradually gained momentum in recent years [7][8][9][10]. Particularly in nano -crystalline materials of metal oxides, there have been impressive results documented by several research groups including our research group in the last couple of years [11][12][13][14][15][16][17][18][19][20][21][22][23]. So far, crystallographic phase stabilities of several technologically important metal oxide NPs and their shock resistant pro les have been reported and they are ZrO 2 (Fm-3m) [11], ZnO (P6 3 mc) [12] α-MnO 2 (I4/m) [13], TiO 2 NPs (I4 1 /amd) [14][15][16][17], Co 3 O 4 (Fd-3m)…”

“…[18], NiO (Fm-3m) [19], CeO 2 (Fm-3m) [20] CuO (Bmm2) [21] α-Fe 2 O 3 (R-3c) [22], AgO (P2 1 /c) [23]. Among the listed NPs, Anatase TiO 2 , ZrO 2 and Co 3 O 4 undergo the crystallographic phase transitions at shocked conditions [11,16,20].…”

Comparative Assessment of Crystallographic Phase Stability of Anatase and Rutile TiO2 at Dynamic Shock Wave Loaded Conditions

“…As a consequence of this, shock wave induced research on crystalline as well as non crystalline materials has gradually gained momentum in recent years [7][8][9][10]. Particularly in nano-crystalline materials of metal oxides, there have been impressive results documented by several research groups including our research group in the last couple of years [11][12][13][14][15][16][17][18][19][20][21][22][23]. So far, crystallographic phase stabilities of several technologically important metal oxide NPs and their shock resistant profiles have been reported which are such as ZrO 2 (Fm-3 m) [11], ZnO (P6 3 mc) [12] α-MnO 2 (I4/m) [13], TiO 2 NPs (I4 1 /amd) [14][15][16][17], Co 3 O 4 (Fd-3 m) [18], NiO (Fm-3 m) [19], CeO 2 (Fm-3 m) [20] CuO (Bmm2) [21] α-Fe 2 O 3 (R-3c) [22], AgO (P2 1 /c) [23].…”

Assessment of shock resistance of barium ferrite at dynamic shocked conditions

“…In recent years, many research groups have been working relentlessly to find out high shock wave-resistant materials for space applications which includes our research group as well [5,6]. So far, shock wave-resistant properties of a few of metal oxides and divalent ferrite nanocrystalline materials such as TiO 2 [14], a-Fe 2 O 3 [15], ZrO 2 [16], ZnO [17], a-MnO 2 [18], NiO [19], Co 3 O 4 [20], CuO [21], AgO [22], CeO 2 [23], ZnFe 2 O 4 [24], NiFe 2 O 4 [25], and MnFe 2 O 4 [26] have been reported. Based on the available literature survey, it has been demonstrated that shock wave-induced phase transformation from anatase to rutile of TiO 2 NPs [14] and cubic ZrO 2 to monoclinic-ZrO 2 can be achieved using piston-driven shock tube [16].…”

“…Based on the available literature survey, it has been demonstrated that shock wave-induced phase transformation from anatase to rutile of TiO 2 NPs [14] and cubic ZrO 2 to monoclinic-ZrO 2 can be achieved using piston-driven shock tube [16]. Fe 2 O 3 NPs suffer the loss of crystalline nature and loss of saturation magnetization without undergoing any phase transitions while imploded with shock waves [15]. MnO 2 and Co 3 O 4 NPs have shown the reversible magnetic phase transitions with respect to the number of shock pulses [18,20].…”