87 Temperature/K 293 (2) 293 (2) Crystal system Monoclinic Monoclinic
Space group P21/n P21/c a/[Angstrom] 12.
The brushite crystals in the SEM images, in agreement with the XRD results, were monoclinic
and appeared as plates (Figure 2) .
7, 10) However, it has also been found that sandblasting can trigger a transition from tetragonal to monoclinic
phase, affecting the mechanical strength of zirconium and most likely the binding capacity of the coating material.
At sintering temperature zirconia is a tetragonal form, and at room temperature it will be in monoclinic
1[degrees] correspond to the 110 and 040 planes, respectively, and are indicative of the typical PP monoclinic
unit cell (Fig.
A strong correlation has been reported in the literature between the amount of monoclinic
phase and degradation of the mechanical properties of zirconia.
It consists of a spontaneous slow transformation from the tetragonal phase to the more stable monoclinic
phase in the absence of any mechanical stresses.
Adipic acid belongs to the monoclinic
3] coating depending on the preliminary warming temperature of the substrate Phase composition, % Substrate temperature, Tetragonal Cubic Monoclinic
structure is stable at room temperature while tetragonal and cubic structures are stable at high temperatures.
Zirconia is also known to gradually weaken over time as the crystal structure changes from a tetragonal phase to a monoclinic
one when exposed to hydrothermal condition.
1], an important feature observed in XRD, which suggest the existence of a monoclinic
It exists in three crys- talline forms: monoclinic
(m) tetragonal (t) and cubic (c).
orthorhombic and anorthic are three crystal systems identified in the mollisols.
The excellent mechanical characteristics such as high strength and fracture resistance are attributed to the ceramics unique ability known as transformation toughening, a stress-induced phase transformation from tetragonal (t) to monoclinic
(m) [1, 2].