The room-temperature decomposition of metastable phases precipitated in the Al-Zn alloys at 200 °C

1978 ◽  
Vol 28 (9) ◽  
pp. 1047-1058 ◽  
Author(s):  
P. Bartuška ◽  
M. Simerská
Keyword(s):  
Room Temperature ◽  
Metastable Phases ◽  
Temperature Decomposition ◽  
Zn Alloys

On the room temperature stability of metastable phases formed at 200 °C in Al—Zn alloys

1979 ◽  
Vol 55 (2) ◽  
pp. 673-679 ◽  
Author(s):  
P. Bartuška ◽  
R. Kroggel ◽  
H. Löffler ◽  
M. Simerská ◽  
V. Syneček ◽  
...  
Keyword(s):  
Room Temperature ◽  
Temperature Stability ◽  
Metastable Phases ◽  
Zn Alloys

scholarly journals Room temperature decomposition of dimethyl methylphosphonate on cuprous oxide yields atomic phosphorus

2019 ◽  
Vol 680 ◽  
pp. 75-87 ◽  
Author(s):  
Lena Trotochaud ◽  
Ashley R. Head ◽  
Christin Büchner ◽  
Yi Yu ◽  
Osman Karslıoğlu ◽  
...  
Keyword(s):  
Cuprous Oxide ◽  
Room Temperature ◽  
Dimethyl Methylphosphonate ◽  
Temperature Decomposition

scholarly journals Influence of strain rate and heat treatments on tensile and creep properties of Zn-0.15Cu-0.07Ti alloys

DYNA ◽  
2016 ◽  
Vol 83 (195) ◽  
pp. 77-83 ◽  
Author(s):  
María José Quintana Hernández ◽  
José Ovidio García ◽  
Roberto González Ojeda ◽  
José Ignacio Verdeja
Keyword(s):  
Strain Rate ◽  
Room Temperature ◽  
Rolling Direction ◽  
Tensile Tests ◽  
Strain Rates ◽  
Creep Tests ◽  
Design Problems ◽  
Creep Properties ◽  
Heat Treated ◽  
Zn Alloys

The use of Cu and Ti in Zn alloys improves mechanical properties as solid solution and dispersoid particles (grain refiners) may harden the material and reduce creep deformation. This is one of the main design problems for parts made with Zn alloys, even at room temperature. In this work the mechanical behavior of a Zn-Cu-Ti low alloy is presented using tensile tests at different strain rates, as well as creep tests at different loads to obtain the value of the strain rate coefficient m in samples parallel and perpendicular to the rolling direction of the Zn strip. The microstructure of the alloy in its raw state, as well as heat treated at 250°C, is also analyzed, as the banded structure produced by rolling influences the strengthening mechanisms that can be achieved through the treatment parameters.

Optical Properties of Copper-Rich Cu-Ni-Zn Alloys with 20 at.% Zinc and up to 25 at.% Nickel at Room Temperature

1970 ◽  
Vol 1 (4) ◽  
pp. 1411-1414 ◽  
Author(s):  
Karl Mamola ◽  
Charles E. McCain ◽  
Klaus Schröder
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Zn Alloys

Photoactivation of silver loaded on titanium(IV) oxide for room-temperature decomposition of ozone

1993 ◽  
Vol 71 (2) ◽  
pp. 195-198 ◽  
Author(s):  
B. Ohtani ◽  
S.-W. Zhang ◽  
T. Ogita ◽  
S. Nishimoto ◽  
T. Kagiya
Keyword(s):  
Room Temperature ◽  
Temperature Decomposition

Effect of CaO on Thermal Conductivities of Mg and Mg-Zn Alloys

2014 ◽  
Vol 783-786 ◽  
pp. 437-442 ◽  
Author(s):  
Gun Young Oh ◽  
Dae Guen Kim ◽  
Young Gyu Yoo ◽  
Young Ok Yoon ◽  
Shae K. Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Property ◽  
Thermal Properties ◽  
Specific Heat ◽  
Room Temperature ◽  
Die Casting ◽  
Steel Mold ◽  
Process Ability ◽  
Zn Alloys ◽  
Thermal Conductivities

The thermal conductivities of binary Mg-CaO and Mg-Zn, and ternary Mg-Zn-CaO alloys have been investigated by evaluating the effect of CaO on pure Mg and Mg-Zn alloys, with an emphasis to develop a new Mg alloy by compromising thermal conductivity, process-ability and mechanical property. The Mg alloys specimens were prepared by casting into a steel mold and then by machining. The thermal conductivities of the alloys were determined by evaluating the thermal properties of specific heat and diffusivity, from room temperature to 200 °C. OM, SEM, and EDS were used to analyze the microstructures and phases. The fluidity was also investigated by using a spiral fluidity mold for improved process-ability during actual die casting.

scholarly journals Formation of metastable calcite-type barium carbonate during low-temperature decomposition of (Ba,Ti)-precursor complexes

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Room Temperature ◽  
Barium Carbonate ◽  
Intermediate Formation ◽  
Partial Substitution ◽  
Structural Domains ◽  
Temperature Decomposition ◽  
Xrd Phase Analysis ◽  
Ir Analysis ◽  
Intergrowth Structures ◽  
Perovskite Type

(Ba,Ti)-precursor complexes, important for the production of advanced BaTiO3 perovskite-type materials, undergo structural transformations and complex reactions during their thermal decomposition. Based on XRD phase analysis, combined with Rietveld refinement of crystal structure data, and on IR analysis, the intermediate formation of calcite-type BaCO3 is evidenced, which can be explained by the stabilization of this metastable modification in the form of an oxycarbonate phase down to room temperature. Two possible processes, leading to such an oxycarbonate, are discussed: (i) partial substitution of CO32− by O2− in the anionic sublattice, and (ii) topotaxial formation of calcite-type structural domains of BaCO3 by templating with oxygen-deficient titanates, resulting in the oxide–carbonate intergrowth structures.

Mg2+-assisted low temperature reduction of alloyed AuPd/C: an efficient catalyst for hydrogen generation from formic acid at room temperature

2015 ◽  
Vol 51 (54) ◽  
pp. 10887-10890 ◽  
Author(s):  
Shuang Wu ◽  
Fan Yang ◽  
Hao Wang ◽  
Rui Chen ◽  
Pingchuan Sun ◽  
...  
Keyword(s):  
Low Temperature ◽  
Formic Acid ◽  
High Activity ◽  
Room Temperature ◽  
Hydrogen Generation ◽  
Efficient Catalyst ◽  
Temperature Reduction ◽  
Temperature Decomposition ◽  
Low Temperature Reduction

An alloyed AuPd/C nanocatalyst was prepared via Mg2+-assisted low temperature reduction, and exhibited high activity in room temperature decomposition of formic acid.

Enhanced catalytic activity of hierarchically macro-/mesoporous Pt/TiO2 toward room-temperature decomposition of formaldehyde

2015 ◽  
Vol 5 (4) ◽  
pp. 2366-2377 ◽  
Author(s):  
Lifang Qi ◽  
Wingkei Ho ◽  
Jinlong Wang ◽  
Pengyi Zhang ◽  
Jiaguo Yu
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Catalytic Decomposition ◽  
Temperature Decomposition ◽  
Formaldehyde In Air

Hierarchically macro-/mesoporous Pt/TiO2 exhibits excellent catalytic activity and recyclability toward catalytic decomposition of formaldehyde in air at room temperature.

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