Control of Inclusion Composition in Calcium Treated Aluminum Killed Steels

Calcium Isotopic Anomalies and the Lack of Aluminum-26 in an Unusual Allende Inclusion

We have studied the Mg and Ca isotopic compositions of an unusual Allende inclusion dominated by hibonite, which is the most refractory and possibly the most primitive major oxide mineral. No 26Mg excess was found in spite of the high 27 Al/24Mg (1 > 103) of some samples, indicating an initial (26Al/27Al)0 < 2 X 10-7, a factor of 250 less than found in some other Allende inclusions. The upper l...

Oxygen isotope heterogeneities in the earliest protosolar gas recorded in a meteoritic calcium–aluminum-rich inclusion

Combined petrologic, oxygen and magnesium isotopic and trace element analyses of a compound calcium–aluminum-rich inclusion (CAI) from the Efremovka reduced CV3 carbonaceous chondrite reveal that it consists of a Mg-rich, O-rich xenolithic CAI, previously altered in the nebula, that impacted an extensively molten, O-depleted, type A host CAI shortly before the end of the host's crystallization....

THE OXIDATION RESISTANCE OF HIGH ALUMINUM HEAT RESISTANT STEELS

Abstract: In this research, the oxidation behaviour of high Aluminum heat resistant steel (%25Cr,%20Ni,%8Al) hasbeen evaluated at the temperature range of (1000-1300ºC).The results showed that there was no countinous healinglayer on the surface of the alloy when Al increased up to %5.5 and the oxidation resistance of steel decreased due toformation of spinel oxides on the surface.By increasing ...

Body composition and calcium metabolism in adult treated coeliac disease.

Twenty two treated adult patients with coeliac disease (aged 20-70 years) were examined. Body composition was assessed from anthropometry and directly measured by dual photon absorptiometry. Bone mineral content was measured in the spine (dual photon absorptiometry) and at two forearm sites (single photon absorptiometry). Compared with age matched healthy subjects, treated coeliac patients had ...

The efficacy of the autogenous fowl cholera killed aluminum hydroxide vaccine in ducks in Iran