共查询到20条相似文献,搜索用时 62 毫秒
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介绍了国内外以冶金矿渣、尾矿渣及粉煤灰、城市垃圾焚烧飞灰为主要原料的废渣微晶玻璃的研究概况,分别对其组成、结构与性能、种类与制备等方面做了分析。重点综述了彩色废渣微晶玻璃的研究现状,在废渣微晶玻璃的基础上,调节玻璃组分,以硒粉、氧化铬、氧化锰等作为着色剂,通过采用一次着色或二次着色工艺,可制备出色彩丰富的废渣微晶玻璃,市场潜力巨大。最后展望了工业及生活废渣制备微晶玻璃的未来发展。 相似文献
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具有生物活性和磁性的微晶玻璃材料被认为是温热疗法治疗癌症的有效热种子材料.本文制备了添加少量B2O3和P2O5后的FeO-Fe2O3-CaO-SiO2体系铁磁微晶玻璃,并进行了微观结构分析、XRD分析、磁性检测以及生理模拟液的浸泡实验.实验结果表明,制备的微晶玻璃材料同时具备磁性和生物活性这两种重要性能.不经过核化处理在1000℃晶化2h能够获得较理想的磁铁矿主晶相和硅灰石次晶相均匀致密分布的微观组织,所得微晶玻璃具有最佳的磁性能.铁含量提高能够增加微晶玻璃的磁性,然而会抑制微晶玻璃表面羟基磷灰石的形成,从而降低其生物活性. 相似文献
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微晶玻璃的摩擦学特性研究进展 总被引:8,自引:0,他引:8
微晶玻璃及其复合材料在各种摩擦条件下,尤其是干摩擦下优良的摩擦学特性赋予了材料很大的研究开发潜力.本文综述了微晶玻璃的摩擦磨损行为与机制,并提出了微晶玻璃在摩擦学领域需要进一步探讨的问题. 相似文献
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机械功能微晶玻璃可加工性能的模糊综合评价 总被引:1,自引:0,他引:1
机械功能微晶玻璃的最佳力学性能与最佳可加工性能所要求的工艺参数并不一致.通常情况下,微晶玻璃材料的硬度越高,其耐磨性越好,但机械加工性能将降低.对机械功能微晶玻璃的可加工性能、钻孔深度和力学性能进行了模糊综合评价,认为模糊综合评价在考虑机械功能微晶玻璃的实际加工状态时更具有科学性. 相似文献
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Robert M. Oxman 《Design Studies》1986,7(4):185-191
In addition to functioning as a general design strategy and, possibly, even as a general problem solving heuristic, componentizing possesses other attributes in a class of design problems involved with diversity and variation. This article is about variation, the way in which systems behave in creating variations, and the principles of design which help achieve variation. 相似文献
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Designing Assemblies 总被引:5,自引:0,他引:5
D. E. Whitney R. Mantripragada J. D. Adams S.J. Rhee 《Research in Engineering Design》1999,11(4):229-253
This paper presents a theory to support the design of assemblies. It brings together prior work in a new synthesis, resulting
in a top-down process for designing assemblies so that they deliver geometric Key Characteristics (KCs) that achieve top level
customer requirements. The theory applies to assemblies that take the form of mechanisms (e.g. engines) or structures (e.g.
aircraft fuselages), but has less relevance to assemblies that take the form of connective or distributive systems (e.g. hydraulic
piping). The theory shows how kinematically constrained (statically determinate) assemblies can be unambiguously designed
to satisfy geometrically-defined customer requirements. The top-down process presented here begins by creating a kinematic
constraint structure and a systematic scheme by which parts are located in space relative to each other, followed by declaration
of assembly features that join parts in such a way as to create the desired constraint relationships. This process captures
design intent by creating a connective data model that contains information to support relevant analyses such as variation
buildup, constraint analysis, and establishment of constraint-consistent assembly sequences. Adjustable assemblies, assemblies
built using fixtures, and selective assemblies can also be described by this theory. Problems arising from multiple KCs and
KC conflict can be identified. Issues unresolved by the theory are also noted. 相似文献
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J.Christopher Jones 《Design Studies》1979,1(1):31-35
The essential point of my paper is that to invent something new, and to bring it into being, is to change not only one's surrounding but no change oneself and the way one perceives, to change reality a little perhaps?Thus the design process is one of devising and experiencing a process of rapid learning about something that does not yet exist by exploring the interdependencies of problem and solution, the new and the old.A question: is it necessary, or even possible, to understand completely the complexities of a product and of its operation when one is designing? 相似文献
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