In addition, it was found that the relationship between the theoretical density of each solid solution and its Cr 2 O 3 content can be fitted using a second-order polynomial. Al95Cr05, Al90Cr10, and Al30Cr70 were analyzed using synchrotron radiation X-ray diffraction analysis under ...
Some sorts of Al2O3_Cr2O3 solid solutions were prepared by coprecipitating hydroxides from the solutions of aluminum and chromium nitrate, followed by decomposing, forming, and firing. The metal specimen was melted on the mirror finished Al2O3-Cr2O3 solid solution at a given temperature in...
The sintering behavior and mechanical properties of the MgO doped Al2O3-Cr2O3 solid solution (MgO =0.7mol%; Cr2O3/( Al2O3+ Cr2O3) = 0, 5, 10, 20, 50, 100 mol%) were studied in two different partial pressures of oxygen (PO2= 10-11 and 2 脳 10-1atm) at 1500-1700掳C...
A process for producing a sinter comprising a homogeneous solid solution of Cr2O3 and Al2O3 even from inexpensive materials; and a sinter obtained by the process. The sinter is obtained by sintering either a powder mixture consisting of a Cr2O3 powder and an Al2O3 powder each substantiall...
Spinel-Corundum Phase Equilibria in the Systems Mn-Cr-Al-O and Co-Cr-Al-O at 1373 K The tie lines delineating ion-exchange equilibria between MCr 2 O 4 -MAl 2 O 4 spinel solid solution, where M is either Mn or Co, and Cr 2 O 3 -Al 2 O 3 ... KT Jacob,GNK Iyengar,WK Kim...
The infiltration with chromic acid into this composite yielded a solid solution of Al2O3-Cr2O3 whose density was about 80% of the theoretical density and the bend strength was around 15 MPa. 展开 DOI: 10.1023/A:1006695829140 被引量: 12 ...
It was found that the free energy change of the reaction : MgO(s)+Cr2O3(s) = MgO·Cr2O3(s) is expressed by-126 800+47.3 T (J/mol) and that MgO·Cr2O3 and MgO·Al2O3 form a solid solution which exhibits negative deviation from ideal behavior at 1600°C. 展开 ...
The Warren-Averbach analysis of strain was used to determine the buildup of elastic strain energy in the spinel crystalline solution matrix (gross composition = 60 mol% MgAl 2 O 2 + 40 mol% Cr 2 O 3 ) during the isothermal (1135掳C) precipitation of a metastable (coherent) monoclinic ...
Inhibition of Cr6+ by the formation of in-situ Cr3+ containing solid-solution in Al<inf>2</inf>O<inf>3</inf>–CaO–Cr<inf>2</inf>O<inf>3</inf>–SiO<inf>2</inf> system 2021, Ceramics International Show abstract Co-existence of a Cr3+ phase (CaAl<inf>2</inf>Cr<inf>2</in...
Interdiffusion occurs between Al atoms and Fe atoms on the base surface to form (Fe,Al) solid solution or Fe-Al intermetallic transition layer in the aluminization step. In the oxidation step, the aluminide layer surface is selectively oxidized to form Al2O3 film. FeAl/Al2O3 coating can ...