TAN Yanchang ZHAO Yuhua WEI Shuning Northeast University of Technology
,
Shenyang
,
China
金属学报(英文版)
Effects of the tempering temperature and time on the shear modulus of Fe-Mn based alloys have been studied.The results show that(ΔG/G)-Tcurves of tempered alloys containing Cr and Ti have two extreme values—maximum and minimum,and that the curves of tem- pered alloys containing Cr,Ni,W and C only have a maximum value.This is the reason that Ni,W and C decrease the transformation point T_N of the antiferromagnetism.The ΔG_λ ef- feet increases gradually with the rise of tempering temperature or with the increase of tem- pering time.
关键词:
Fe-Mn based alloys
,
null
,
null
,
null
类伟巍
,
沈龙海
,
刘丹
,
李雪飞
,
彭刚
,
崔启良
,
邹广田
无机材料学报
doi:10.3724/SP.J.1077.2007.00400
采用直流电弧法使金属钽和氮气直接反应制备出了TaN纳米粉．利用XRD、XPS、TEM等测试方法对所制备的TaN纳米粉进行了表征．结果表明: 所制备的纳米粉为单一的立方相TaN, 纳米颗粒的平均粒度为5~10nm．实验中还发现氮气的气压对制备纯立方相TaN具有关键性作用, 并讨论了立方相TaN的形成机理．
关键词:
立方相TaN
,
nanocrystallites
,
dc arc discharge method
类伟巍
,
沈龙海
,
刘丹
,
李雪飞
,
彭刚
,
崔启良
,
邹广田
无机材料学报
doi:10.3321/j.issn:1000-324X.2007.03.004
采用直流电弧法使金属钽和氮气直接反应制备出了TaN纳米粉.利用XRD、XPS、TEM等测试方法对所制备的TaN纳米粉进行了表征.结果表明:所制备的纳米粉为单一的立方相TaN,纳米颗粒的平均粒度为5～10nm.实验中还发现氮气的气压对制备纯立方相TaN具有关键性作用,并讨论了立方相TaN的形成机理.
关键词:
立方相TaN
,
纳米粉
,
直流电弧法
D.Eylon
,
S.R.Seagle
材料科学技术（英文）
The state of Ti research, development and industry is reviewed in this article. The fifty-year anniversary of Ti technology commercialization in the USA provides an opportunity for a historical perspective. Incorporation of "information-age" tools into alloy development, processing, and production invigorates the technology. Consolidation, diversification and globalization have been transforming the Ti industry in the recent years.
关键词:
Anti-Corrosion Methods and Materials
Purpose - This paper aims to study the corrosion behavior of carbon steel and stainless steel in white oil with naphthenic acid under high temperature. Design/methodology/approach - The weight-loss method and surface analysis were used to study the corrosion behavior of steel in white oil with naphthenic acid. Findings - Naphthenic acids corrosion rates were directly related to experimental temperature, immersion time and total acid number (TAN). The activation energy was calculated and the process kinetics could be represented by Arrhenius-type equation. The relationship between the isothermal line in liquid phase and that in vapor phase at different TAN values had a significant distinction with the change of temperature. Originality/value - The findings have important implications for assessing the corrosivity of crude oils with high TAN value from various resources.
关键词:
Corrosion;Stainless steel;Oils;Acids;refineries
