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DEVELOPMENT OF COMPOSITE FUNCTIONAL MATERIALS WITH HIGH PERFORMANCE AND THEIR PROCESSING TECHNOLOGY

高性能复合功能材料及其加工技术的开发

基本信息

批准号：
11695064
负责人：
MATSUBARA Yasuhiro
金额：
$ 1.66万
依托单位：
KURUME NATIONAL COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

The purpose of this project is to research and develop the composite functional materials with high performance and their processing technique by cooperating with researchers of Keimyung University in Korea. The research was curried out on four themes and the following results were obtained :(1) Alloy design, solidification process and wear resistant of high functional wear resistant cast alloys.Three kind of alloys were designed to have totally 200/0 of strong cabide forming elements such as Cr, Mo, W and V so that two different types of each special coexist in each alloy. The carbon content was determinated referring to the parameter of carbon balance. Chemical composition and coexisting cabides of alloys are, Fe - 3%C- 10%Cr-5%Mo -5%W (M_7C_3+M_6C, alloy 1), Fe - 3%C - 10% V - 5% Mo - 5%w, (MC+M_2C, alloy 2) and Fe - 3.5%C - 17% Cr - 3%V (M_7C_3+(MC), alloy 3)Solidification sequence of each alloy is as follows,In all the specimens, the abrasion wear resistance was found to increase … More in the order of homogenized (AH), as-cast (AS), hardened and temped (AHFT) and as-hardened (AHF) states. In as-cast and homenized states, the highest wear resistance was obtained in alloy 2 and lowest one was alloy 3. In hardened and tempered states, the wear resistance of alloy 2 was greatly increased or greatest and it followed with difference by the order of alloy 3 and alloy 1. From these results, MC cabide having extreme hardness and matrix with martensite or tempered martensite and some retained austenite were found to be significant phases to improve the abrasion wear resistance.(2) Surface improvement of materials using ion beam. MgO thin films have been widely used for protecting film of electrodes or phosphors in Plasma Display Panel (PDP), and the improvement of the efficiency of resistance has been required, because it is indispensable to achieve the long life of PDP. Fast Atom Beam Sputtering Method has been applied in order to estimate the resistance of these thin films against the fast atom bombardment with the energy of 2.0keV. The difference of energy and the momentum between the atoms and plasma particles in PDP must be considered in case of making exact estimation of resistance against plasma exposure ; rapid estimation is convenient if the relative estimation is required. The amount of the atoms that were bombarded upon the surface of the specimen was monitored by small electrode attached just in front of the upper specimen window and the current of the secondary electron were measured. After the irradiation by the same amount of atoms, the gap between sputtered area and un-sputtered area, which that was covered with small glass plate, were measured by Dektak3. MgO specimens were prepared by means of EB deposition method in Keimyong University ; of which thickness were 200 to 500 nm and these X-ray diffraction pattem were confirmed by thin film X-ray diffraction system. There were no differences between these specimens although the preparation conditions of them were slightly different in heat treatment after and in-situ deposition.The results of estimation of the resistance against fast atom beam bombardment were summarized as follows ;(1) MgO coated specimen shows better resistance than that of the uncoated glasses that were sputtered in the same way as to get the standard value.(2) The resistance of the non-heat-treatment free MgO shows better performance than that of heat-treated specimens.(3) The reason (2) has not been cleared from the results of X-ray diffraction pattern and the observation of the surfaces of the specimens by AFM, but to measer the hardness of these films have been expected to making it clear.(3) Compounding of rubber, plastic and inorganic materials. The use of polyamide/aluminium pigment compounds instead of aluminium for automobile wheel cap will bring the reduction of cost and the environmental problems because of the elimination of coating process using toxic organic solvents. To prevent the increase of yellowness and decrease of the physical properties of nylon, Nylon6/inorganic pigments composites mixed with antioxidants or dispersion agents were prepared, and optimum amount of the antioxidants was investigated. Samples mixed with antioxidants showed less yellowness than a sample free of antioxidants. For the aging test in the 125'C oven, it was found that much slower decrease of the tensile strength occurred in the antioxidants added samples compared with those without antioxidants. Among antioxidants added, Irganox I 098 and B 1 1 7 1 were better antioxidants for Nylon6 systems. To get good dispersion of aluminium pigment in the Nylon6, it was found that the additives such as acrylic acid wax and Al coupling agent were effective. (4) Study of abrasion wear properties of composite multi-component white cast irons.Composite multi-component white cast irons(Fe-5%Cr-5%Mo-5%W-5%V-2%C-Co) containing O, 2, 5 and I O mass % Co were prepared to clear the effects of cobalt content and heat treatment condition on hardness and properties of abrasion and sliding wears. The hardness of the cast irons decreased with an increase in cobalt content in as-cast and annealed states, but it increased conversely in the tempered state. It was found from the tests results using Suga type wear tester that the abrasion wear resistance lowered with an increase in hardness regardless of cobalt content. In the case of Pin on disk type wear test, the sliding wear resistance of the cast iron increased with increasing cobalt content and showed greatest in the sliding speed ranging from 3 to 4 m/s. It is considered that the sliding wear resistance could relate to the properties of oxide film produced during wear. Less

本项目的目的是与韩国启明大学的研究人员合作，研究开发高性能复合功能材料及其加工技术。（1）高性能耐磨铸造合金的合金设计、凝固工艺及耐磨性设计了三种合金，其中强碳化物形成元素Cr、Mo、W和V的比例为200/0，使每种合金中两种不同类型的碳化物共存。参照碳平衡参数测定了碳含量。合金的化学成分及共存碳化物为：Fe - 3%C- 10%Cr-5%Mo-5%W（M_7C_3+M_6C，合金1），Fe - 3%C -10%V-5%Mo- 5%w，（MC+M_2C，合金2）和Fe - 3.5%C -17%Cr- 3%V（M_7C_3+（MC），合金3）各合金的凝固顺序如下： ...更多信息按均匀化（AH）、铸态（AS）、硬化和回火（AHFT）和硬化态（AHF）的顺序。在铸态和均匀化状态下，合金2的耐磨性最高，合金3的耐磨性最低。在淬火和回火状态下，合金2的耐磨性大幅度提高或最大，其次是合金3和合金1的差异。从这些结果中，发现具有极高硬度和具有马氏体或回火马氏体和一些残余奥氏体的基体的MC碳化物是改善耐磨性的重要相。(2)利用离子束进行材料表面改性。MgO薄膜已被广泛用于等离子体显示器（PDP）中的电极或荧光粉的保护膜，并且要求提高电阻效率，因为它是实现PDP的长寿命所不可缺少的。用快原子束溅射法测量了这些薄膜对能量为2.0keV的快原子轰击的抵抗能力。在对等离子体暴露阻力进行精确估算时，必须考虑PDP中原子和等离子体粒子之间的能量和动量差，如果需要相对估算，则可以快速估算。轰击在样品表面上的原子的量通过附接在上样品窗口正前方的小电极来监测，并且测量二次电子的电流。在相同数量的原子辐照后，用Dektak 3测量溅射区与未溅射区之间的差距，其中未溅射区覆盖有小玻璃板。利用Keimyong大学的电子束沉积方法制备了厚度为200 ~ 500 nm的MgO样品，并用薄膜X射线衍射系统对这些样品的X射线衍射图进行了验证。结果表明：（1）MgO涂层玻璃的抗快原子束轰击性能优于未涂层玻璃，而未涂层玻璃的抗快原子束轰击性能则优于未涂层玻璃。(2)未经热处理的MgO试样的电阻性能比热处理试样的电阻性能好。(3)从X射线衍射图和原子力显微镜对样品表面的观察结果来看，原因（2）还没有明确，但通过测量这些薄膜的硬度，有望使其明确。(3)橡胶、塑料和无机材料的复合。用聚酰胺/铝颜料复合物代替铝用于汽车轮盖，可降低成本，同时由于消除了使用有毒有机溶剂的涂装工艺，可减少环境问题。为了防止尼龙黄度的增加和物理性能的下降，将抗氧剂或分散剂加入尼龙6/无机颜料复合材料中，并研究了抗氧剂的最佳用量。与抗氧化剂混合的样品显示出比不含抗氧化剂的样品更少的黄度。对于在125 ℃烘箱中的老化测试，发现与不含抗氧化剂的那些样品相比，在添加抗氧化剂的样品中发生的拉伸强度的降低慢得多。在抗氧剂中，Irganox I 0 98和B 1 1 7 1是尼龙6体系较好的抗氧剂。为了使铝粉颜料在尼龙6中获得良好的分散性，丙烯酸蜡、铝偶联剂等添加剂是有效的。(4)多元复合白色铸铁磨粒磨损性能的研究制备了含O、2、5和10质量% Co的多元复合白色铸铁（Fe-5%Cr-5%Mo-5%W-5%V-2%C-Co），研究了Co含量和热处理条件对硬度、磨粒磨损和滑动磨损性能的影响。在铸态和退火态，铸铁的硬度随钴含量的增加而降低，而在回火态，硬度则随钴含量的增加而增加。从使用Suga型磨损试验机的试验结果发现，无论钴含量如何，耐磨性都随着硬度的增加而降低。在销盘磨损试验中，随着钴含量的增加，铸铁的滑动磨损抗力增加，在3 ~ 4 m/s的滑动速度范围内，耐磨性最高。认为滑动磨损抗力与磨损过程中产生的氧化膜的性质有关。少