The Superstructure in the a Phase of Silver-Magnesium Alloys

Clarebrough, L. M.; Nicholas, JF

doi:10.1071/ch9500284

Cited by 4 publications

(3 citation statements)

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“…The existence of a superlattice in the 0~ phase of the silver-magnesium alloy system was first suggested by Andrews & Hume-Rothery (1943) and confirmed by Clarebrough & Nicholas (1950), Schubert, Kiefer, Wilkens & Haufler (1955) and Kachi (1955). Nicholas (1953) proposed cubic symmetry for the low-tempera-ture phase, and Buckley, Axon & Conacher (1959) found no evidence of non-cubic symmetry.…”

Section: Introductionmentioning

confidence: 82%

Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states

Hämäläinen¹,

Laine²,

Tarna³

1969

J Appl Cryst

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The α phase of the silver–magnesium alloy system containing 26.1 atomic per cent magnesium has been studied by X‐ray diffraction methods in the temperature range from 20 to 678°C. The tetragonal symmetry of the low‐temperature phase is confirmed. The temperature variation of the lattice parameters and the volume expansion coefficient have been determined. It seems likely that the order–disorder transformation is a first‐order rather than a second‐order transformation.

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Section: Introductionmentioning

confidence: 82%

Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states

Hämäläinen¹,

Laine²,

Tarna³

1969

J Appl Cryst

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“…The eutectic mixture presumably consists of a silver solid solution and the intermetallic phase AgMg. The phase Ag 3 Mg is a result due to an ordering of the silver solid solution (Ag) proceeding at a relatively slow cooling rate of 30°C/hour in the temperature interval from 386°C to 389°C [25]. Since the cooling rate during quenching of the crucible in water is 3 to 4 orders higher than the cooling rate mentioned above, the phase Ag 3 Mg is not evolving in the microstructure.…”

Section: Silver Alloyed With Magnesiummentioning

confidence: 99%

Degradable silver‐based alloys

Hoyer

Grydin

Frolov

et al. 2020

Materialwissenschaft Werkst

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Noble metals solved in iron implants are effective cathodes, which can suit to accelerate the corrosion rate of the base material. In terms of its antibacterial behavior as well as lower costs in comparison with gold or platinum, silver seems to be an attractive candidate to adapt the corrosion rate of implants to the medical requirements. However, the degradation of silver in human bodies is a time-consuming process, and is controversially discussed due to the unknown long-term effect of silver on the human organism. Alloying silver with chemical elements less resistant to corrosion in aqueous mediums, particularly, in simulated body fluid, can improve the degradability of silver. Therefore, the current study addresses the design of adapted silver alloys exhibiting improved degradability in comparison with pure silver. Pure silver and binary silver alloys containing silicon, magnesium and calcium are studied in terms of their microstructure, open-circuit potential and degradation rate. Keywords: Silver alloys / alloy-design / biomedical application / open-circuit potential / degradability Edelmetalle, die in eisenbasierten Implantaten gelöst sind, wirken als effektive Kathoden und können die Korrosionsrate des Grundwerkstoffs beschleunigen. In Bezug auf sein antibakterielles Verhalten sowie die niedrigeren Kosten im Vergleich zu Gold oder Platin, ist Silber ein attraktiveres chemisches Element, um die Korrosionsrate von eisenbasierten Implantaten an die medizinischen Anforderungen anzupassen. Der Abbau von Silber im menschlichen Körper ist jedoch ein zeitaufwändiger Prozess und wird aufgrund der noch nicht eindeutig geklärten Langzeitwirkung von Silber auf den menschlichen Organismus kontrovers diskutiert. Legieren von Silber mit chemischen Elementen, die weniger korrosionsbeständig in wässrigen Medien, insbesondere in simulierter Körperflüssigkeit, sind, kann die Resorbierbarkeit von Silber begünstigen. Daher befasst sich diese Studie mit dem Design von adaptierten Silberlegierungen, die im Vergleich zu reinem Silber eine verbesserte Resorbierbarkeit aufweisen. Reinsilber und binäre Silberlegierungen, die Silizium, Magnesium und Calcium enthalten, werden hinsichtlich ihres Gefüges, des freien Korrosionspotenzials und der Degradationsrate untersucht. Schlüsselwörter: Silberlegierung / Legierungsentwicklung / Biomedizinische Anwendung / Freies Korrosionspotenzial / Resorbierbarkeit

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“…Although the Ag-Mg system has been investigated many times, no single investigator has done a thorough job over the whole range of the diagram. The main features of the diagram were first delineated by Zemczuzny (3) and later refined and supplemented by other investigators (4)(5)(6)(7)(8)(9)(10)(11)(12). The early findings of Saeftel and Sachs (13) are by now completely discredited.…”

Section: The Silver-magnesium Systemmentioning

confidence: 99%

Defect Structure and the Temperature Dependence of Hardness of an Intermetallic Compound

Westbrook¹

1957

J. Electrochem. Soc.

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The temperature dependence of hardness of the intermetallic compound normalAgMg was studied from −190°C to the solidus temperature over the entire homogeneity range. The effect of structure on hardness at high homologous temperatures differs radically from that at low temperatures. These results, over virtually the full homologous temperature range, appear to rationalize previously contradictory studies of the effect of defect structure on the room temperature strength of intermetallic compounds.

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The Superstructure in the a Phase of Silver-Magnesium Alloys

Abstract: X-ray and electrical resistivity studies of a silver-magnesium alloy containing 25 atomic per cent, of magnesium are described. From the results, it is concluded that a superlattice exists at this composition, the order-disorder transformation occurring between 386 and 389 O C .

Cited by 4 publications

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Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states

Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states

Degradable silver‐based alloys

Defect Structure and the Temperature Dependence of Hardness of an Intermetallic Compound

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The Superstructure in the a Phase of Silver-Magnesium Alloys

Abstract: X-ray and electrical resistivity studies of a silver-magnesium alloy containing 25 atomic per cent, of magnesium are described. From the results, it is concluded that a superlattice exists at this composition, the order-disorder transformation occurring between 386 and 389 O C .

Cited by 4 publications

References 0 publications

Thermal expansion of the Ag3Mg alloy in the ordered and disordered states

Thermal expansion of the Ag3Mg alloy in the ordered and disordered states

Degradable silver‐based alloys

Defect Structure and the Temperature Dependence of Hardness of an Intermetallic Compound

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Product

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Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states

Thermal expansion of the Ag₃Mg alloy in the ordered and disordered states