简介:Inordertoutilizetheadvantageofoxidesinstainlesssteel,theformationoftitaniumnitride(TiN)andoxide(TixOy)inthe17CrsteelwasinvestigatedbythecalculationofthefreeenergyofreactionandthermodynamiccalculationwithThermo-calcsoftware.Theresultindicatesthatthecompetitivereactionbetweenthedissolved[O]andthedissolved[N]withthedissolved[Ti]inmoltensteelresultsindifferentprecipitationsequencesofTiNandTixOy.TheprimaryprecipitationofTiNrequiresalow[O]andtheprimaryprecipitationofTixOyrequiresalow[N].Theincreaseof[Ti]causesahigherprecipitationtemperatureofTiNandTixOyinbothTi-NandTi-Oalloysystems.Equilibriumrelationsof[Ti]vs[N]and[Ti]vs[O]showthatthesolubilityproductsfallwiththedecreaseofthetemperature,andthentheprecipitationoftheinclusionsbecomeseasier.IntheTi-Oalloysystem,ahigh[O]andalow[Ti]arefavorabletotheprecipitationofTi3O5,andahigh[Ti]contentandalow[O]favorabletotheTi2O3precipitation.
简介:目前临床上许多医疗单位仍采用巴氏分类法诊断宫颈细胞学涂片。随着TBS诊断方法的逐渐普及,越来越多的单位开始接受这一最新的诊断报告方式。本文将542例宫颈细胞学涂片以TBS诊断报告并结合DNA倍体分析,结果有78例经TBS检查细胞形态有异常改变,但其中只有一例可以诊断为恶性(考虑为CIS),其余77例均不能作出肯定的恶性诊断。将此78例患者再取材进行DNA倍体分析,结果有6例经DNA倍体分析仪分析为多倍体(DI>2),术后病理证实均为恶性,阳性检出率为TBS诊断报告结果的6倍。由此可见,在诊断宫颈细胞学时,以“TBS”结合DNA倍体分析,对宫颈癌的早期诊断更有帮助,阳性率及准确性更高。