熔剂净化对Al－4．5wt％Cu合金过冷及组织的影响

采用盐类熔剂对大体积Ａｌ－４．５ｗｔ％Ｃｕ合金进行净化处理，研究了熔剂净化对Ａｌ－４．５ｗｔ％Ｃｕ合金过冷及组织的影响。通过大量的实验研究证明：粘性熔剂更能有效地去除合金中的异质核心，使合金获得较大的过冷度；随着过冷度的增大，合金的宏观组织由细小的等轴晶逐渐过渡到粗大的柱状晶，其临界转变过冷度为４０℃；二次枝晶间距随过冷度的增大而增大，其转变过冷度为５０℃。     

Importance of Low-Temperature Melt-Mixing on the Construction of Stereocomplex Crystallites with Superior Nucleation Efficiency in Asymmetric Poly(l-lactide)/Poly(d-lactide) Blends

The nucleation efficiency (NE) of stereocomplex crystallites (SCs) formed in asymmetric poly(L-lactide)/poly(D-lactide) (PLLA/PDLA) blends is generally unsatisfactory because the competition between stereocomplexation and chain mixing involved in the melt-mixing process can cause low formation efficiency and even severe aggregation of SCs. Herein, it is attempted to achieve high-efficient formation of finely dispersed SCs particles by designing a unique melt-mixing procedure, where the mixing of PLLA with 0.75 wt% PDLA is first performed at elevated temperatures (far above the melting temperature of SCs) to allow the homogeneous mixing of PLLA/PDLA chains and then at a low temperature (slightly above that of homocrystallites) to permit the full stereocomplexation of the premixed chains. It is found that the SCs formed in the blends exhibit unexpectedly low NEs (e.g., 54.5%), much inferior to that (73.6%) in the counterpart without undergoing premixing. This is because the introduction of premixing leads to a remarkable deterioration in the amount of SCs particles formed, despite decreased particle size, highlighting that the direct mixing at low temperatures of 170–180 °C (about 20–30 °C lower than that used in common melt-processing of PLA) is more effective for the construction of SCs with superior NE. The mechanisms for these striking findings are discussed.     

Effects of can parameters on canned—forging process of TiAl base alloy（Ⅱ）——Mechanical behavior

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｉＡｌａｌｌｏｙｈａｓｌｏｎｇｂｅｅｎｃｏｎｓｉｄｅｒｅｄａｓａｐｒｏｍｉｓ ｉｎｇｍａｔｅｒｉａｌｆｏｒｈｉｇｈｔｅｍｐｅｒａｔｕｒｅａｐｐｌｉｃａｔｉｏｎ ,ｄｕｅｔｏｉｔｓｅｘｃｅｌｌｅｎｔｈｉｇｈｔｅｍｐｅｒａｔｕｒｅ ｐ     

红外测温技术在离心复合铸造轧辊生产上的应用

本文分析了离心复合铸造轧辊生产过程中离心机停机温度和时间对轧辊质量的影响 ,提出了用先进的红外测温技术来预报停机温度和时间 ,以实现微机监控适时停机 ,保证轧辊内外层熔合良好 ;同时指出了红外测温技术在离心复合铸造轧辊生产上的应用前景     

PTA装置中冷凝器壳体腐蚀原因分析及防护对策

对仪征化纤化工厂PTA装置中反应器第一冷凝器E-112 壳体腐蚀状况进行了分析.结果表明，高温高压冷凝液的冲刷是造成E-112壳体腐蚀穿孔的 主要原因，并提出相应防护对策.     

LC9铝合金热扭转晶粒细化

ＬＣ９铝合金在７７３Ｋ热扭转中显微组织由粗大的柱状晶转变为细等轴晶。研究表明：其晶粒细化的过程为：位错的聚集；亚晶网络的形成；亚晶界面两侧晶体位向差的增加；亚晶界转变为晶界。从而细晶网络形成。     

大型钛合金压气机盘超塑性等温锻造模具结构及工艺参数实验研究

通过超塑拉伸和压缩试验，用金属铅进行模拟实验，探讨了大型ＴＣ１１合金压气机盘超塑性等温锻造的工艺参数，模具结构，锻坯形状尺寸及润滑剂的选择、并讨论了其模具材料及加热方式的选择。     

辐照损伤对锆合金电化学性能的影响

综述了堆内辐照对锆合金电化学性能影响的概况，浅析了堆内辐照损伤的机理，并重点探讨了主要的堆内辐照源——中子辐照对锆合金微观结构与氧化性能的影响。进一步阐述了堆外离子轰击模拟堆内中子辐照研究方法的进展概况，并就离子轰击实验参量的选择进行了较为深入的分析。     

塑料包装应用及技术进展

塑料在包装领域有着广泛的应用，其中聚酯（PET）性能优良，应用领域不断扩大。介绍了塑料包装不断通现的新技术，以及塑料包装环保问题的几点思路。     

Insights into the intrinsic interaction between series of C1 molecules and surface of NiO oxygen carriers involved in chemical looping processes

Understanding and modulating the interaction between various reactive molecules and oxygen carriers are the key issue to achieve process intensification of chemical looping technology. C1 chemical molecules play an important role in many reactions involved with chemical looping processes. However, up to now, there is still a lack of systematic and in-depth understanding of the adsorption mechanism of C1 molecules on the surface of oxygen carriers (OCs). In this work, the intrinsic interaction between a series of C1 molecules composed of CH₄, CO, CO₂, CH₃OH, HCHO and HCOOH and surface of NiO OCs in the chemical looping process have been studied using density functional theory calculations. Various adsorption configurations of C1 molecules and also different adsorption sites of NiO have been considered. The structural features of stable configuration of C1 molecules on the surface of NiO OCs have been obtained. Further, the interacted sites, types and strengths of C1 molecules on the surface of NiO have been directly pictured by the independent gradient model methods. Also, the nature of the interaction between C1 molecule and NiO surface has been investigated with the aid of energy decomposition analysis from a quantitative view.