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Phase Diagrams
Published in Zainul Huda, Metallurgy for Physicists and Engineers, 2020
Basics. A material exhibiting complete solid solubility and liquid solubility of its constituent for all compositions, is called isomorphous alloy/material system. Owing to 100% solid solubility, there exists only a single type of crystal structure for all compositions in an isomorphous material system. Examples of isomorphous material systems include: Cu-Ni alloy, Sb-Bi alloy, NiO-MgO ceramic system, and the like (McHale, 2010).
Corrosion behaviour of low-cost Ti–4.5Al–xV–yFe alloys in sodium chloride and sulphuric acid solutions
Published in Corrosion Engineering, Science and Technology, 2019
Michael O. Bodunrin, Lesley H. Chown, Josais W. van der Merwe, Kenneth K. Alaneme
The most utilised titanium alloy is Ti–6Al–4V, popularly referred to as the ‘titanium workhorse’ [13,28]. Newly developed alloys are often compared with this alloy. Unlike in other studies where full substitution of vanadium, an isomorphous beta stabiliser, is done with either iron, chromium, manganese or other cheaper eutectoid stabilisers [22,29–31], the partial replacement of vanadium with iron adopted in this study was aimed at suppressing the formation of intermetallic compound which is the equilibrium phase that is formed when eutectoid formers such as iron, chromium, manganese, nickel are used as beta stabilisers. It was reported that the use of both isomorphous and eutectoid beta stabilising elements such as iron and molybdenum could suppress the formation of intermetallic compound in beta titanium alloys [32].
Review: the multicolored coordination chemistry of violurate anions
Published in Journal of Coordination Chemistry, 2019
Volker Lorenz, Phil Liebing, Felix Engelhardt, Franziska Stein, Marcel Kühling, Lea Schröder, Frank T. Edelmann
Early structural studies of barium violurate showed that this salt is isomorphous with lead(II) violurate, but not with magnesium violurate [71–73]. The rare O,O-coordination mode of violurate ligands has recently been found in our laboratory in a novel structurally characterized barium 1,3-dimethylviolurate complex. In an attempt to prepare Ba(Me2Vio)2·nH2O, a suspension of Ba(OH)2 in water was heated with 2 equiv. of 1,3-dimethylvioluric acid until a clear, red-violet solution had formed. Surprisingly, the resulting violet crystals were shown by single-crystal X-ray diffraction to be the mixed-ligand complex Ba(Me2Vio)(NO2Barb)·4H2O (CCDC 1864564, NO2Barb = 5-nitro-1,3-dimethylbarbiturate anion) as illustrated in Figure 6 [68]. It is well established that derivatives of nitrobarbituric acids (also named dilituric acids) can be formed from violuric acids under oxidative conditions (in this case aerial oxidation) [1, 74] and form an interesting group of bidentate ligands by themselves [75–77]. Due to the oxophilic and electropositive nature of barium, all ligands in Ba(Me2Vio)(NO2Barb)·4H2O are coordinated through oxygen atoms, including the unusual O,O-bidentate bonding of the nitro group of the NO2Barb– ligand [68].
Transition metal salts of quinoline: synthesis, structure and magnetic behavior of (QuinH)2[MX4]·2H2O [Quin = quinoline; M = Mn, Co, Cu, Zn], (QuinH)2[MnBr2(H2O)2](Br)2 and (QuinH)[Cu(Quin)Br3]
Published in Journal of Coordination Chemistry, 2018
Christopher P. Landee, Jeffrey C. Monroe, Robert Kotarba, Matthew Polson, Jan L. Wikaira, Mark M. Turnbull
The magnetic properties of the isomorphous cobalt compounds (QuinH)2CoCl4·2H2O (1) and (QuinH)2CoBr4·2H2O (2) are similar and will be discussed together. Their susceptibilities are plotted as a function of temperature in Figure 12, in which a semi-log scale has been used to emphasize the important low-temperature region. Upon cooling from 300 K, the susceptibilities increase as T−1 down to 20 K (1) and 40 K (2). Below these temperatures, the susceptibilities increase more slowly; 1 continues to increase to a maximum value of 0.426 cm3 mol−1 at 1.80 K while 2 reaches a maximum value of 0.253 cm3 mol−1 at 3.20 K before decreasing to 0.212 cm3 mol−1 at 1.80 K. Above 30 K, the data sets are superimposable.