Structural model of low-temperature phase transformation and fracture of zirconia-based ceramic material

1997 ◽  
Vol 38 (6) ◽  
pp. 213-215
Author(s):  
V. N. Antsiferov ◽  
V. I. Ovchinnikova



1967 ◽  
Vol 26 (2) ◽  
pp. 77-78 ◽  
Author(s):  
H.W. King ◽  
F.H. Cocks ◽  
J.T.A. Pollock


2007 ◽  
Vol 56 (10) ◽  
pp. 911-914 ◽  
Author(s):  
L. Yang ◽  
X.-L. Wang ◽  
C.T. Liu ◽  
J.A. Fernandez-Baca ◽  
C.L. Fu ◽  
...  


1981 ◽  
Vol 36 (9) ◽  
pp. 967-974 ◽  
Author(s):  
Gerhard Fecher ◽  
Alarich Weiss ◽  
Gernot Heger

Abstract The crystal structure of the low temperature phase of anilinium bromide, C6H5NH3⊕Br⊖, was studied by neutron diffraction at T = 100 K. The refinement supports an ordered structure. The structures of the low and high temperature phases are compared and the mechanism of the phase transformation is discussed.





2001 ◽  
Vol 57 (6) ◽  
pp. 791-799 ◽  
Author(s):  
Menahem Kaftory ◽  
Mark Botoshansky ◽  
Moshe Kapon ◽  
Vitaly Shteiman

4,6-Dimethoxy-3-methyldihydrotriazine-2-one (1) undergoes a single-crystal to single-crystal reversible phase transformation at 319 K. The low-temperature phase crystallizes in monoclinic space group P21/n with two crystallographically independent molecules in the asymmetric unit. The high-temperature phase is obtained by heating a single crystal of the low-temperature phase. This phase is orthorhombic, space group Pnma, with the molecules occupying a crystallographic mirror plane. The enthalpy of the transformation is 1.34 kJ mol−1. The small energy difference between the two phases and the minimal atomic movement facilitate the single-crystal to single-crystal reversible phase transformation with no destruction of the crystal lattice. On further heating, the high-temperature phase undergoes methyl rearrangement in the solid state. 2,4,6-Trimethoxy-1,3,5-triazine (3), on the other hand, undergoes an irreversible phase transformation from single-crystal to polycrystalline material at 340 K with an enthalpy of 3.9 kJ mol−1; upon further heating it melts and methyl rearrangement takes place.



2011 ◽  
Vol 106 (7) ◽  
Author(s):  
Jian-Tao Wang ◽  
Changfeng Chen ◽  
Yoshiyuki Kawazoe


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