Ag—Pd—Ru三元系相图的700℃等温截面

采用Ｘ射线衍射。电子探针和金相星微镜等方法研究了Ａｇ－Ｐｄ－Ｒｕ三元素相图的７００℃等截面。发现在该截面上沿着Ａｇ－Ｐｄ侧有一单相区（Ａｇ、Ｐｄ）,这个单相区在富Ｐｄ区城较宽。在该截面的富Ｒｕ侧也存在一较小的单相区（Ｒｕ）;在这两个单相区之间是一个宽阔的二相区（Ａｇ＋Ｒｕ）。此外,在Ａｇ－Ｐｄ－Ｒｕ三元系富Ａｇ－Ｒｕ侧的部分成分区域,由于合金在液态出现分层现象,凝固后难于获得均匀合金,致使该区域内     

Pt—Pd—Rh合金的高温力学性能

在Ｐｔ－４Ｐｄ－３５Ｒｈ合金中将Ｐｄ含量增至１５ｗｔ％时,研究了Ｐｄ及少量Ｃｅ、Ｒｕ对合金在１０００℃以下高温力学性能的影响。实验结果表明在低温下Ｐｄ有一定的强化作用,但降低了合金的抗蠕变性能,而在合金中分别添加Ｃｅ（＜０１ｗｔ％）、Ｒｕ（＜０５ｗｔ％）后,合金的高温力学性能得以改善并优于Ｐｔ－４Ｐｄ－３５Ｒｈ合金,且Ｃｅ对合金的强化作用优于Ｒｕ。     

Ag-Ru-Gd(Gd≤33.3 at%)三元系相图700℃等温截面

用Ｘ－射线衍射和金相显微镜方法分析研究了含０－３３．３ａｔ％Ｇｄ的Ａｇ－Ｒｕ－Ｇｄ三元系,作出了该体系部分相图的７００℃等温截面。在该截面上存在５个单相区：Ａｇ、Ｒｕ、Ａｇ５１Ｇｄ１４、ＡｇＧｄ和ＧｄＲｕ;２７个两相区;Ａｇ２Ｇｄ＋ＧｄＲｕ２、Ａｇ５１Ｇｄ１４＋ＧｄＲｕ２、Ａｇ５１Ｇｄ１４＋Ａｇ２Ｇｄ、Ａｇ＋Ｒｕ、ＧｄＲｕ２＋ＧｄＲｕ２＋Ｒｕ、Ａｇ＋Ａｇ５１Ｇｄ１４和Ａｇ５１Ｇｄ１４＋Ｒｕ;３个三     

萃取法研究Pd^2＋—dppe—PCA^—体系的芳环堆积作用

用萃取法测定了Ｐｄ２＋－ｄｐｐｅ－ＰＣＡ－体系在氯仿—水介质条件（Ｉ＝１．０，ＫＮＯ３，ｐＨ＝２）下的堆积百分数。堆积百分数可用Ｓｔ％＝１－Ｄｏｐ／Ｄｔｏｔ来表示。用斜率法和固体合成法确定了协萃合物的化学组成为Ｐｄ（ｄｐｐｅ）（ＰＣＡ）２。计算出相同条件下混配合物的堆积百分数按下列顺序变化：Ｐｄ（ｄｐｐｅ）（Ｂｚ）２＜Ｐｄ（ｄｐｐｅ）（ＰＡｃ）２＜Ｐｄ（ｄｐｐｅ）（ＰＰｒ）２＜Ｐｄ（ｄｐｐｅ）（ＰＢｕ）２。表明堆积百分数与ＰＣＡ－中亚甲基数有关，合适的碳链长度可使参与堆积的两个苯环达到“最佳堆积”     

耐蚀性钛合金

概述了Ｔｉ－Ｎｉ－（Ｐｄ，Ｒｕ）－Ｃｒ，Ｔｉ－Ｒｕ－Ｎｉ、Ｔｉ－Ｐｄ－Ｃｏ等新型耐蚀钛合金的耐蚀性能。     

钌在含氮或氮硫杂环树脂上的吸附行为

研究了配位原子为氮或氮硫的５种新型功能性树脂对Ｒｕ（Ⅳ）的吸附行为（３－氨甲基吡啶树脂（３－ＡＭＰＲ）、吡唑树脂（ＰＡＺＲ）、２－氨甲基吡啶树脂、Ｎ－甲基－２－硫咪唑树脂、２－硫－苯骈咪唑树脂的功能基（ＦＧ）含量为３．１６～４．８７ｍｍｏｌＦＧ／ｇ树脂），以及酸度、温度、时间对吸附的影响。测定其吸附容量、吸附比、吸附速率常数、吸附熵、分配系数和洗脱率等参数。３－ＡＭＰＲ有最高的吸附容量１．６４ｍｍｏｌＲｕ（Ⅳ）／ｇ３－ＡＭＰＲ和最低的吸附比１．９４ＦＧ／Ｒｕ（Ⅳ）（摩尔比）。吸附在ＰＡＺＲ上的Ｒｕ（Ⅳ）可被５％硫脲水溶液：丙酮：盐酸＝１：１：２（体积比）的混合溶液洗脱，洗脱率１００．３％。化学法，红外谱图阐明了树脂吸附Ｒｕ（Ⅳ）的机理。     

Ti—Ni—Nb三元系相图700℃等温截面

应用多元扩散偶－电子探针微区成分分析技术，测定了Ｔｉ－Ｎｉ－Ｎｂ三元系相图７００℃等温截面，确定了该三元系相图的７００℃等温截面的１２个单相区，２３个两相区和１０个三相区。１２个单相区是：α－Ｔｉ、β－（Ｔｉ，Ｎｂ）、Ｔｉ２Ｎｉ、ＴｉＮｉ、ＴｉＮｉ３、（Ｎｉ）、Ｎｉ３Ｎｂ、Ｎｉ６Ｎｂ７、ＸＡ、ＸＢ、ＸＣ和ＸＤ，其中ＸＢ化合物为首次发现。     

添加元素对Ti—Ta合金耐蚀性的影响

采用失重法和电化学测试研究了Ａｌ、Ｍｏ、Ｚｒ合金添加元素对Ｔｉ－Ｔａ合金在高温浓ＨＮＯ３溶液中耐蚀性的影响以及溶液中Ｒｕ＾３＋的作用。结果表明：在Ｔｉ－Ｔａ合金中加入Ａｌ、Ｍｏ元素，则降低合金的耐蚀性能；添加Ｚｒ，合金的抗腐蚀性能有所提高；溶液中的Ｒｕ＾３＋可以加速所研合金的钝化，提高合金的抗蚀能力。电化学测试结果与腐蚀试验完全一致。     

5—（3—羧基苯偶氮）—8—氨基喹啉光度法测定微量钯

合成了新试剂５－（３－羧基苯偶氮）－８－氨基喹啉（ｍ－ＣＰＡＱ）在弱碱性介质中,Ｔｗｅｅｎ－８０和ＴｒｉｔｏｎＸ－１００存在下ｍ－ＣＰＡＱ与Ｐｄ（Ⅱ）生成紫蓝色三元络合物,λｍａｘ＝６１５ｎｍ,ε１＝８．４×１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,Ｐｄ在０～３０μｇ／２５ｍｌ符合比尔定律,用于岩矿中微量Ｐｄ的测定,结果满意。     

盐酸介质中铜置换钯的两种反应机理

用旋转圆盘法考察了盐酸浓度对铜置换Ｐｄ（Ⅱ）反应速度的影响，发现在低盐酸深度（０．０１～０．１ｍｏｌ／Ｌ）时，反应速度极快，在液相中发生ＣｕＣｌ＾－２对Ｐｄ（Ⅱ）的化学还原，反应产物Ｃｕ与Ｐｄ的摩尔比为１：１，铜离子为二价；在较高酸度（３～５ｍｏｌ／Ｌ）时，反庆速度显著变慢，转换反应仅在铜片表面进行，属于电化学反应机理，速率方程为ｌｏｇＣ０／Ｃｔ＝２．７２３×１０＾－３ｔ－０．００２，产物Ｃｕ与Ｐ     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

The Mirror with Patterns of Auspicious Animals and Grapes——Exquisite cast mirror and the technology of surface tin-enrichment by rubbing-in and infiltration of tin-rich powder

<正>Bronze mirrors were used by the Chinese people before the introduction of the glass mirror.Only after it was replaced by the glass mirror did the bronze mirror gradually retreat from people's lives.Different styles of bronze mirrors were made in different historical periods,particularly in the Warring States Period,the Han and Tang Dynasties,which were the three peaks of the development of bronze mirror arts in ancient China.The casting techniques were exquisite.The surface of the bronze mirror was smooth and bright enough to reflect one's image,and there were scarcely any casting defects on the mirror surface.On the back of the bronze mirror,there were rich depictions of Arts and Humanities,and the ornamentations were also     

The 9th China International Diecasting Congress & Exhibition

The 9th China International Diecasting Congress ＆ Exhibition was held on July 22-24, 2014 at Shanghai New International Expc Centre. This exhibition was the most successful over the years, with over 6890 visitors and 155 exhibitors, and the exhibition area increased by 30% from 9,500 square meters in 2012 to 12340 square meters. Die casting enterprises from a total of 24 countries and regions, including China mainland, Chinese Taiwan and Hong Kong, South Korea, Japan, Germany, India, Thailand, Malaysia, the United States, Russia, Australia, Iran, Ukraine, Brazil, Colombia, Singapore, Austria, Canada, Croatia, France, Turkey, United Kingdom, Vietnam, attended the congress and exhibition.     

Introduction of the Fluid Control Engineering Institute of Kunming University of Science and Technology

正The Fluid Control Engineering Institute of Kunming University of Science and Technology was set up in 1996.The researches of institute concentrate on electro-hydraulic(pneumatic)servo/proportional control and hydromechatronics.The Institute is committed to research and development of electro-hydraulic control of high-end technical equipment in ferrous metallurgy refining produc-     

RARE METALS Volume Contents

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Antimony Induced Crystallization of Amorphous Silicon

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.     

A CUMULATIVE FATIGUE DAMAGE RULE UNDER THE ALTERNATIVE OF CORROSION OR CYCLIC LOADING

Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.