Development of the Function Aligning Crystal Orientation to Materials Used in Practice

一、碳材料的研究：发现了以下知识：（1）碳纤维在5 T的强磁场和弱张力下的热处理，使碳纤维的机械强度增强一倍。（2）在强磁场作用下加热沥青可形成大小均匀的酶微球。（3）均三甲苯在高压下分解形成中间相颗粒的反应，在10 T的磁场作用下受到很大的干扰。II.生物材料的研究：生物材料如羟基磷灰石（HAp）的单向晶体排列对骨修复是有用的。(1)A最近提出了一种新的方法，其中在高磁场下的粉浆浇铸过程中旋转样品以制造单向取向的压块。这种新工艺表明，获得了高达约100%的晶体取向。（3）制备了羟基磷灰石/胶原复合材料。高度定向C ...更多信息 III.锌基金属的研究：发现在凝固过程中施加强磁场可以使锌的晶体定向排列IV.陶瓷的研究：在强磁场下，通过注浆成型过程中旋转样品，制备了定向排列的Si_3N_4结构陶瓷和Bi_2Te_3热电陶瓷压坯。利用该方法制备了多层单向取向的氮化硅压坯，其机械强度比无取向的氮化硅压坯高。在323 K时，Bi_2Te_3的优值为1.3，是迄今为止报道的最高值。V.相变速率原位定量方法的研究：发展了一种新的相变速率定量方法，并应用于γ/α相变。这种方法是原位的，能够清楚地确定转换的起点和终点。少

I.Research on carbon materials :The following knowledge has been found. (1)The heat treatment of carbon fibers under a high magnetic field of 5T and weak tension strengthens double the mechanical strength of carbon fibers. (2)Mesophase microspheres with homogenous size can be formed by heating a tar pitch under a high magnetic field. (3)The reaction in which mesophase particles are formed by decomposing mesitylene under high pressure, is considerably disturbed by imposition of a magnetic field of 10T.II.Research on biomaterials :The uni-directional crystal alignment of biomaterials such as hydroxyapatite (HAp) is useful for bone reparation. (1)A novel process where a sample is rotated during a slip casting under a high magnetic field has newly been proposed to fabricate uni-directionally oriented compacts. This new process indicated that crystal orientation as high as about 100% was obtained. (3)Moreover, the fabrication of HAp/collagen composite also was carried out. Highly oriented c … More ollagen fibers and weakly crystallized HAp crystals were fablicated.III.Research on nonmagnetic metals :It has been found that the imposition of a high magnetic field during solidification can align Zinc crystal orientation.IV.Research on ceramics :Uni-directionally oriented compacts of structural Si_3N_4 ceramics and thermoelectric Bi_2Te_3 ceramics were fabricated by rotating a sample during slip casting under a high magnetic field. This method was developed to prepare the compact with multilayer of uni-directionally oriented compact of Si_3N_4, which had higher mechanical strength than that without crystal orientation. The figure of merit for fabricated Bi_2Te_3 1.3 at 323K, is the highest value among the values reported hitherto.V.Research on development of an in situ, method to quantify a phase transformation rate :A new method to quantify a phase transformation rate has developed and applied to γ/α phase transformation. This method is in situ and enables to clearly determine the start and end points of the transformation. Less