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The solidification behavior of calci...

Prapakorn, Kritsada.

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The solidification behavior of calcium oxide-aluminum oxide slags.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The solidification behavior of calcium oxide-aluminum oxide slags./
Author:	Prapakorn, Kritsada.
Description:	204 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0909.
Contained By:	Dissertation Abstracts International64-02B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3082627
ISBN:	0496304782

The solidification behavior of calcium oxide-aluminum oxide slags.
Prapakorn, Kritsada.

The solidification behavior of calcium oxide-aluminum oxide slags. - 204 p.

Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0909.

Thesis (Ph.D.)--Carnegie Mellon University, 2003.

The binary CaO-Al2O3 based slag and the ternary CaO-Al2O3-MgO based slag are common slags covering and inclusions that are found in calcium treated Al-killed, continuously cast steels. However, the effect of cooling conditions and chemistry on the solidification behavior of these slags is not well characterized. To better understand this phenomena, the solidification behavior of these slags was studied by using double hot thermocouple technique. TTT and CCT diagrams of these slags were determined to quantify the solidification behavior in both dry and humid atmospheres.

ISBN: 0496304782Subjects--Topical Terms:

1017759
Engineering, Materials Science.

The solidification behavior of calcium oxide-aluminum oxide slags.
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100 1 $a Prapakorn, Kritsada. $3 1928048
245 1 4 $a The solidification behavior of calcium oxide-aluminum oxide slags.
300 $a 204 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0909.
500 $a Adviser: Alan W. Cramb.
502 $a Thesis (Ph.D.)--Carnegie Mellon University, 2003.
520 $a The binary CaO-Al2O3 based slag and the ternary CaO-Al2O3-MgO based slag are common slags covering and inclusions that are found in calcium treated Al-killed, continuously cast steels. However, the effect of cooling conditions and chemistry on the solidification behavior of these slags is not well characterized. To better understand this phenomena, the solidification behavior of these slags was studied by using double hot thermocouple technique. TTT and CCT diagrams of these slags were determined to quantify the solidification behavior in both dry and humid atmospheres.
520 $a In this work, these slag samples were easily undercooled and the solidification behavior of these slags was found to be a strong function of cooling conditions. The crystallization tendency of these slags follows the trends suggested by the phase diagram.
520 $a In CaO-Al2O3 based slags, The eutectic composition (50%CaO) give the lowest crystallization tendency due to the lowest liquidus temperature. In a eutectic CaO-Al2O3 slag sample, dissolved water in the sample increases crystallization tendency and enhances the growth. It was also found that the crystalline phase that formed during cooling in both the dry and humid conditions is the mixture between 3CaO.Al2O 3 and CaO.Al2O3 phases.
520 $a In CaO-Al2O3-MgO based slags, the crystallization tendency increases with MgO content because the high MgO content leads to the high liquidus temperature. The effect of dissolved of water on the crystallization of CaO-Al2O3-MgO based slags is not as prominent as in the eutectic CaO-Al2O3 slag. Thus, the addition of MgO to CaO-Al2O3 slags was seen to minimize or eliminate the effect of humidity on the solidification of CaO-Al2O3 based slags.
520 $a In this work, Uhlmann's method was used to estimate the solid-liquid interfacial energy of CaO-Al2O3 based slag for the temperature between 1100--1250°C. The result is between 0.25--0.4 Joules/m 2.
590 $a School code: 0041.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Metallurgy. $3 1023648
690 $a 0794
690 $a 0743
710 2 0 $a Carnegie Mellon University. $3 1018096
773 0 $t Dissertation Abstracts International $g 64-02B.
790 1 0 $a Cramb, Alan W., $e advisor
790 $a 0041
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3082627