On the formation of irregular monotectic structures

Thermal parameters and microstructure during transient directional solidification of a monotectic Al–Bi alloy

“…This seems to explain the present experimental results, which were characterized by a C-value of the growth law ( 2 v = C) which is larger than those found for growth under steady-state conditions characterized by very low growth rates and where the mentioned convective effects seem to be less significant or even negligible. As proposed by Carlberg and Bergman [7], the monotectic growth can also be related with v and G. Fig. 6b shows the correlation of the interphase spacing with G × v. Although the literature concerning dendritic growth proposes specific exponents to be used in this kind of correlation [7,[18][19][20], the present exponents were experimentally defined.…”

“…As proposed by Carlberg and Bergman [7], the monotectic growth can also be related with v and G. Fig. 6b shows the correlation of the interphase spacing with G × v. Although the literature concerning dendritic growth proposes specific exponents to be used in this kind of correlation [7,[18][19][20], the present exponents were experimentally defined. Fig.…”

“…It is also highlighted that published values of C for Al-Bi monotectic differ up to one order of magnitude (between 10 −14 and 10 −15 ). However, Carlberg and Bergman [7] reported that the relation between fiber spacing and solidification thermal variables (G and v) for monotectics could be not only similar to the growth law for some irregular eutectics but also very similar to relations for dendritic growth.…”

“…Much research has been devoted in order to better comprehend the distinct morphologies obtained by monotectic reaction [4][5][6][7][8][9][10]. Some criteria to define when one prevails along solidification have also been proposed.…”

Microstructural evolution during upward and downward transient directional solidification of hypomonotectic and monotectic Al–Bi alloys

“…Much research has been devoted in order to better comprehend the distinct morphologies obtained by monotectic reaction [4][5][6][7][8][9][10][11][12]. As found in other researches, Ratke and Müller [7,8] assume that the phase spacing evolution in the monotectic Al-Bi alloy follows the classical relationship used for eutectics: 2 v = C, where v is the solidification velocity and C a constant value.…”