玻璃钢制品拉拔模具的型腔表面处理工艺

玻璃钢制品拉拔工艺是较为先进的制造工艺之一，拉拔模具是决定玻璃钢制品质量好坏的关键。介绍了玻璃钢制品拉拔模具的型腔表面处理工艺，采用该处理工艺能有效地提高玻璃钢制品的质量。     

Aging and mechanical properties of NR/BR blends

The mechanical properties and post-thermal aging properties of natural rubber (NR) and polybutadiene rubber (BR) blends at different blending ratios are investigated herein. The experimental results show that both tensile and tear strengths of NR/BR blends increase with increasing NR content. BR has a higher compression stiffness than NR. The deformation of BR is less than that of NR under the same load conditions. With regard to aging properties, both tensile stress and strain of NR/BR blends decrease after prolonged aging. In addition, the stress loss of BR is lower than that of NR, meaning that the aging resistance property of BR is superior to that of NR. Furthermore, accumulated thermal history has shifted the glass transition temperature (T _g) of NR/BR blends toward lower temperatures while the loss tangent (tan δ) value increases with prolonged thermal aging.     

Fabrication of composite wire of lead coated on glass fiber by extrusion

1　INTRODUCTIONCoatingglassfiberwithleadproducesakindofnewcontinuouscomposite ,whichcanfindwideap plicationsinmanydifferentfields ,especiallyinthebatteryoftheEVsandHEVsthathasalreadybecomethemostimportantgoalinmostcountries[13] .Withakindofspecialtechnologythiskindofnewcompos itewirecanbeusedtoproducegridsofnewleadacidbatterythatisveryusefultotheEVsandHEVs .Thiskindofnewleadacidbatteryhasmanyadvan tages ,suchashigherspecificenergy ,lessinnerresis tance ,morequicklychargingcapabilityand…     

Enabling factors toward production of nanostructured steel on an industrial scale

Utilizing the existing properties of steel, a modern technological society has been constructed. While there are over 25,000 worldwide equivalent steels based on manipulating the eutectoid transformation, there exist only a handful of commercial nanostructured steel alloys based on manipulating the more complex glass devitrification transformation. Thus, research on nanostructured steels is in its infancy, and many further developments are expected with the demonstrated promise of developing new combinations of superior properties. In this article, seven enabling metallurgical factors are presented that ultimately allow a variety of nanostructured steel products to be produced in an ever-increasing array of industrial processing techniques. Additionally, a case example of the formation of nanostructured steel are given showing how these factors can be harnessed on an industrial scale.     

非晶态Pd—Cu—Si合金的晶化动力学研究

本文应用DSC研究了非晶态Pd-Cu-Si合金的晶化过程动力学.根据Kissinger峰移法和Arrhenius方程分别计算了晶化激活能,发现等温晶化动力学在0.15相似文献   

用铸造废砂制备磷酸盐泡沫陶瓷的研究

以经过活化处理后的铸造废砂为主要原料，以磷酸和磷酸盐为发泡固化剂，再配以必要的添加剂，通过混合搅拌、浇注成型、烧结强化工艺制造的磷酸盐泡沫陶瓷具有高强和多孔特征。研究表明：影响材料性能的主要因素有废砂活性、磷酸、添加剂、烧结工艺以及混合料中的铝硅比等。技术经济分析表明了这项工艺技术具有废物利用量大．生产过程简单，产品用途广泛，对铸造行业的废弃物资源化具有积极意义。     

添加稀土引致的磷化膜变化与促进机制

用能谱与SEM分析，发现加入稀土硝酸盐(REN)后明显提高了无定形晶体Zn2Fe(PO4)2在磷化膜表面的覆盖率，而使得膜的耐蚀性能提高.此时膜内相关元素含量比例发生了变化：P增大,Zn减小，可见磷对膜耐蚀性的贡献比锌大.讨论认为，稀土硝酸盐是一个有良好载氧能力的催化剂，具有良好的成核促进作用和阴极去极化作用，从而能加速磷化并使膜的耐腐蚀性能提高.      

CoCrPtNb／CrTi／C多层膜记录介质的制备和性能研究

采用CoCrPtNb四元合金作磁记录介质，并采用多层膜结构（CoCrPt）100-Nbx/CrTi／C／Glass制备玻璃盘基硬盘。实验结果表明：采用适宜厚度的籽晶层与合适组分的底层和磁性层的多层膜结构，即使在室温下溅射，此种薄膜磁记录介质也可得到高达260kA／m的矫顽力；在550℃高温下，经过30min真空退火后，其矫顽力有较大幅度提高，并在Nb含量为2．4％（原子分数）时达到极大值386kA／m，适用于高密度磁记录。同时，也详细分析了磁性层和底层组分、籽晶层厚度以及真空退火对磁记录介质磁性能和微结构的影响。     

Application of an analytical phase transformation model

Employing isothermal and isochronal differential scanning calorimetry, an analytical phase transformation model was used to study the kinetics of crystallization of amorphous Mg82.3Cu17.7 and Pd40Cu30P20Ni10 alloys. The analytical model comprised different combinations of various nucleation and growth mechanisms for a single transformation. Applying different combinations of nucleation and growth mechanisms, the nucleation and growth modes and the corresponding kinetic and thermodynamic parameters, have been determined. The influence of isothermal pre-annealing on subsequent isochronal crystallization kinetics with the increase of pre-annealing can be analyzed. The results show that the changes of the growth exponent, n, and the effective overall activation energy Q, occurring as function of the degree of transformation, do not necessarily imply a change of nucleation and growth mechanisms, i.e. such changes can occur while the transformation is isokinetic.     

有减水作用的新型高效陶瓷助磨剂研制

利用曼尼奇反应原理 ,制备了多胺基磷酸钠陶瓷助磨剂 ,采用红外光谱、差热分析等对合成的助剂进行了表征 ;此外 ,通过对氧化铁以及石英滑石等原料的助磨应用测试表明 :合成的助剂是一种高效陶瓷助磨剂 ,同时还具有减水作用。