Metal intermetallic compounds

Metals Crystallographic Data File (CRYSTMET). Toth Information Systems Inc., Ottawa, Canada. Electronic database of crystal structures of metals, intermetallic compounds and minerals. WWW.Tothcanada.com. 

Metals, intermetallic compounds, and alloys generally react with hydrogen and form mainly solid metal-hydrogen compounds (MH ). Hydrides exist as ionic, polymeric covalent, volatile covalent and metallic hydrides. Hydrogen reacts at elevated temperatrrres with many transition metals and their alloys to form hydrides. Many of the MH show large deviations from ideal stoichiometry (n= 1, 2, 3) and can exist as multiphase systems. 

Metals, intermetallic compounds and alloys generally react with hydrogen and form mainly solid metal-hydrogen compounds. Hydrides exist as ionic, polymeric covalent, volatile covalent and metallic hydrides. 

Use of mercury as electrode material resolves the problem of the negative potential zone being too small but brings others, as it is a liquid. When a metal ion is reduced on the mercury surface to the metal, this can diffuse to within the mercury film, forming Hg-M bonds, or, if there is more than one dissolved metal, intermetallic compounds can be formed within the mercury, as is the case of Cu-Zn. Reoxidation of intermetallic... 

This paper discusses transition metal intermetallic compounds, in the context of the reactivity and physical properties expected for materials produced via solid-solid reactions at the metal catalyst oxide-support interface. It is shown that several observable and proposed features of the so called Strong Metal-Support Interaction (SMSI) — chemisorption activity, phase segregation, and encapsulation — follow naturally from the chemistry of these materials. Both literature precedent and experimental data are presented to support the close relationship suggested above. 

Development of metal/intermetallic compound functionally graded material produced by eutectic bonding method. 

It would not be appropriate here to discuss the many points at issue in the intense international debate which has been going on for some time in this area. The comments of the discussion panel at the international conference on magnetism in Kyoto, ICM 82, provide a convenient summary (Kanamori 1983) and a book dedicated to itinerant magnetism is now available (CapeUmann 1987). We shall therefore give only a brief outline of the expectations of those theories which are currently used by the majority of experimentalists in attempting to explain the observed ferromagnetic behaviour of the transition metal intermetallic compounds. 

In the compilation which follows some attempt has been made to indicate the extent to which individual transition metal intermetallic compounds conform to the expectations of the theoretical work described above. 

Magnetic properties of the transition metal intermetallic compounds with yttrium. Detailed references are given in the article by Buschow (1977). 

Alloy Mixture of metals, intermetallic compounds and/or nonmetals. 

Table 10.4 Ammonia synthesis rates of rare earth metals intermetallic compounds (5 MPa and Sv = l,20,000h )...

We believe therefore that the possible applications of rare earth-transition metal intermetallic compounds either as hard or soft magnetic materials or in other connections are at present not yet exhausted. By the intensive research performed in this held, new applications in science and technology will emerge in the not too distant future. 

This chapter deals with the structural chemistry of compounds of the actinide elements from Ac to Es as elucidated mainly by the methods of x-ray and neutron diffraction. Metals, intermetallic compounds, and alloys are not considered here (see Chapter 19 and the review by Lam et al. [250]). 

The material complexity of solder joints arises from the presence of the base metal(s), the intermetallic compound layers, and the bulk solder [5]. Each one of those materials has different mechanical properties (e.g., yield strength, ductility, ultimate strength, etc.). In addition, Pb-Sn materials have strength properties that are very strain rate sensitive. The yield strength and ultimate tensile strength values increase dramatically with faster strain rates [29]. Also, there are two interfaces associated with each intermetallic compound layer—the base metal/intermetallic compound interface and the solder/intermetallic compound interface— which can exhibit significantly different adhesion properties. 

Among the best known is the Collin Manson model [Eq. (9)] which states that the product of the number of cycles to failure and the plastic strain squared is a constant. The model only addresses plastic strain. According to the model, a metal, intermetallic compound, or interface which is... 

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