Microhardness of phosphate glasses

Densification contribution as a function of strain rate under indentation of terbium-doped aluminophosphate glass

“…If this conclusion was made for silica glass with a predominant densification mechanism of plastic deformation, it is even more relevant for aluminophosphate glass characterized by higher contribution of shear deformation in comparison with silica glass. The chain-like structure of Q 2 phosphate structural group of the investigated aluminophosphate glass contains a large amount of network modifiers, which facilitates the shear plastic flow along the weak ionic bound interfaces in network modifierrich regions [1,18,34]. The sliding along these interfaces favors the rearrangements of the atoms, which under acting pressure tend to form a more densified structure.…”

“…The optical, structural, and thermal properties [20], and also phase transformation and microstructure evolution after heat treatment of phosphate glasses containing terbium ions were recently reported [21]. Taking into account the mechanical impact in some of the above-mentioned applications, it has become important to investigate the peculiarities of their mechanical behavior [1,22,23]. It is known that phosphate glasses possess a polymeric-like structure, but the addition of network modifiers changes this 3D structure into 1D one.…”

“…It was suggested [1] that different mechanisms may be responsible for the plastic deformation of glassy matrix, the main of which are the particular modes of shear flow [2][3][4][5][6][7] and permanent densification caused by the compression of material [8,9]. The contribution of each of these mechanisms to the total plastic deformation strongly depends on the composition and the resulting glass structure, particularly, on the atomic packing density [8,10].…”

Glass-ceramic materials from electric arc furnace dust

“…As a result, the depolymerization of the vitreous network was not appreciably affected. Consequently, the activation of densification and plastic flow [16], being the two basic mechanisms for plastic deformation were not altered, since they are based on the rupture of atomic bonds [17].…”

Bone Tissue Engineering

“…PGs having a ternary system (P 2 O 5 OCaOONa 2 O) have been previously investigated in considerable depth with relation to chemistry, degradation, biocompatibility, and cytotoxicity. [17][18][19][20][21][22][23][24] Furthermore, the addition of PG into polymers such as PLA may further enhance the complex nature of the degradation of the matrix. 25,26 The degradation of PLA has been shown to be affected by a number of factors, such as chemical structure, crystallinity, molecular weight, processing conditions, shape, and size.…”