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Investigation of (Cr,Co)^sub 7^C^sub 3^-fcc-Graphite Equilibrium in the Temperature Interval 1373 to 1473 K
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In the current study, the phase equilibria between fcc, graphite and M^sub 7^C^sub 3^ (M = Cr,Co) have been studied at 1373 °K, 1423 °K, and 1473 °K. The solubility of Co in the M^sub 7^C^sub 3^ phase and the solubility of Cr and C in the fcc phase have been determined by the high-temperature equilibration and quenching technique. Appropriate mixtures of Cr^sub 7^C^sub 3^ + Co or Cr^sub 7^C^sub 3^ + Co + C were equilibrated and subsequently quenched in liquid nitrogen. The quenched samples...
Related newspaper, magazine, and journal articles from HighBeam Research
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Thermodynamic Investigations of Cr^sub 3^C^sub 2^ and Reassessment of the Cr-C System
Metallurgical and Materials Transactions
; The Gibbs energies of formation for Cr^sub 3^C^sub 2^, Δ^sub f^G^sub Cr^sub 3^C^sub 2 have been obtained from electromotive force (EMF) measurements, in the temperature range 950 to 1150 K, using the following galvanic cells with CaF^sub 2^ single crystals as the electrolyte: Cr, CrF^sub 2^
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Mechanical Behaviors of Chromium- or Niobium-Modified Ni^sub 47.5^Al^sub 25^Fe^sub 27.5^ Alloy at Elevated Temperature
Metallurgical and Materials Transactions
; The microstructure of the Ni^sub 47.5^Al^sub 25^Fe^sub 27.5^ alloy was modified by adding Cr or Nb to improve its tensile properties. Increasing the Cr content increased the volume fraction of the interdendritic regions and, subsequently, increased the tensile elongation at room temperature.
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Influence of Ni Content on the Microstructure and Dry Sliding Wear Properties of Cr^sub 13^Ni^sub 5^Si^sub 2^/[gamma] Intermetallic Alloys
Metallurgical and Materials Transactions
; The effect of Ni content on microstructure, hardness, and wear resistance was studied for the Cr^sub 13^Ni^sub 5^Si^sub 2^-base intermetallic alloys toughened by Ni-base solid solution 947;). Volume fraction and microhardness of the Cr^sub 13^Ni^sub 5^Si^sub 2^ primary dendrite as well as the
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The Possible Application of Nb-W-Cr Alloys in High-Temperature Air
JOM
; Alloys from the Nb-W-Cr system have been investigated for possible application at temperatures above 1,000C. In this study, Nb-20W-5Cr (compositions are in weight percent) and Nb-20W-10Cr alloys were exposed to air for both 24 hours and 168 hours in a temperature range of 700C to 1,400C in order to
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First-Principles Computations of Mechanical Properties of Ni^sub 2^Cr and Ni^sub 2^Mo
Metallurgical and Materials Transactions
; Nickel-based alloys are being considered for use as the outer container of the waste package for the disposal of high-level nuclear waste. During fabrication processes and long-term storage. Ni-based alloy outer containers can undergo microstructural changes due to the formation of Ni^sub 2^Cr,
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The Solubility of Cr^sub 2^O^sub 3^ in Calcium Ferrite Slags at 1573 K
Metallurgical and Materials Transactions
; Continuous converting of copper matte based on calcium ferrite slag has many attractions for the copper smelting industry. However, a serious drawback is that this slag leads to shorter furnace campaigns because it is aggressive toward the magnesia-chromia refractories that form the furnace lining.
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Microstructure and Properties of Ni^sub 3^Si Alloyed with Cr Fabricated by Self-Propagating High-Temperature Synthesis Casting Route
Metallurgical and Materials Transactions
; Ni^sub 3^Si alloys with 20, 30, and 40 wt pet Cr were fabricated by self-propagating high-temperature synthesis casting at 543 K. Thermite reaction (Cr^sub 2^O^sub 3^ + 5CrO^sub 3^ + 12Al = 7Cr + 6Al^sub 2^O^sub 3^) was used in Cr alloying. The method is simple and economical when used to prepare
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Existence of a Solid Solution between 3CaO . V^sub 2^O^sub 5^ and 3CaO . P^sub 2^O^sub 5^
Metallurgical and Materials Transactions
; In the present work, a solid solution of 3CaO . V^sub 2^O^sub 5^ and 3CaO . P2O5 was found below 1573 K. The solution could be described as 3CaO + xV^sub 2^O^sub 5^ + (1 - x) P^sub 2^O^sub 5^. The solid solutions at three compositions, namely, X = [fraction one-third], X = , and X = [fraction
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The Effect of Nb and W Alloying Additions to the Thermal Expansion Anisotropy and Elastic Properties of Mo^sub 5^Si^sub 3^
Metallurgical and Materials Transactions
; The directional thermal expansion and elastic properties of Mo^sub 5^Si^sub 3^, (Mo^sub 0.8^Nb^sub 0.2sub 5^Si^sub 3^, and (Mo^sub 0.85^W^sub 0.15sub 5^Si^sub 3^ have been studied as a function of temperature through the use of single crystals. Thermal expansion anisotropy was reduced by Nb and W
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Computation of Ni-Cr Phase Diagram via a Combined First-Principles Quantum Mechanical and CALPHAD Approach
Metallurgical and Materials Transactions
; A first-principles quantum-mechanical computational code has been used to compute the energy of formation for selected ordered and topologically close-packed (TCP) phases in a Ni-base alloy. The thermodynamic data are incorporated into an existing database for Ni alloys and used in conjunction with
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