3D computer models reference book “T-x-y diagrams of oxide systems”
The Reference Book of ternary systems phase diagrams computer models for molybdenum and tungsten compounds is presented. Its models give a possibility to calculate the mass balances in any temperature intervals, to observe crystallization history and the process of microstructure forming at different crystallization stages.
Computer models of eutectic-type T-x-y diagrams with allotropy Two inner liquidus fields of two low-temperature modifications of the same component
Using the eutectic-type T-x-y diagram as an example, it can be represented the analysis of its geomet- rical construction dependence on the temperature of a component two polymorphous modifications which par- ticipate in mono- and invariant metatectic and invariant eutectic (eutectoid) transformations above or below (and within) binary eutectics temperature intervals and below a ternary eutectic temperature. Computer models for con- sidered phase diagrams have been designed. Such models help to solve applied tasks like visualization, isopleths and isothermal sections decoding, mass balances calculation and evaluation of phase and conglomerate concentration in microstructure.
Microstructure of the solder-casting zone in bridges of dental gold alloys.
The composition and structure were studied in the cast and in the solder of bridges which had failed clinically. Both materials were gold alloys but with different contents of Pt, Ag and Zn. The metallographic investigation revealed defects mostly in the solder, situated in the subsurface layer. SEM studied of the fracture surface revealed large porosites and a structure of dense parallel lines--striations--, indicating that the material had failed from fatigue. The materials in the fractured bridges were identified by micro-probe measurements. It was stated that cast material and solder material used together, were of different composition.