Design, Fabrication and Characterization of Advanced Metal Matrix Composites with Bimodal Size Distributions of Ceramic Particulates

具有陶瓷颗粒双峰尺寸分布的先进金属基复合材料的设计、制造和表征

• 批准号: 13450285
• 负责人: WAKASHIMA Kenji
• 金额: $ 9.54万
• 依托单位: Tokyo Institute 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450285/
• 关键词: Metal Matrix Composites; Ceramic Particulates; Reactive Synthesis; Aluminum; Titanium Boride; Alumina; Stiffness; Creep; アルミナ; 反応焼結; ヤング率; 微視力学; アルミニウム(Al); 二ほう化チタン(TiB_2); 粒子強化

This research has been done in an attempt to develop a new type of aluminum-base metal matrix composites (MMCs) with particulate ceramic reinforcements as advanced high-temperature structural materials. Paying special attention to different roles of ceramic particles with much different sizes in conventional particulate-reinforced MMCs and dispersion-strengthened alloys, we have planed to examine, toward the design of novel 'hybrid' particulate MMCs, the effects of particle size on elevated-temperature stiffness and creep resistance in MMCs which contain either one or both of fine (<1μm) and coarse (【approximately equal】10μm) ceramic particles. To this end, the present work begins with reactive synthesis of TiB_2 /Al MMCs from Al-Ti-B mixed elemental powders because this reactive powder processing can produce submicron-size TiB_2 particulates in situ in aluminum matrices. Here, we are much involved in a problem as to the undesirable compound Al_3Ti that forms intermediately and often r … More emains in final products under the usual processing conditions with heating temperatures of up to 1000℃. Our detailed study has shown that two intermediate compounds AlB_2 and Al_3Ti, known previously, can decompose in the presence of molten aluminun, forming TiB_2 and Al, i.e. AlB_2 +Al_3Ti→ TiB_2+4Al. This reveals a proper range of reactant compositions, xAl-Ti-2B with x【greater than or equal】4 for making the desired TiB_2 /Al two-phase MMCs, the critical composition x=4 corresponding to a maximum of 27.9 vol.% TiB_2. Then, the work proceeds to the fabrication of three different 20 vol.% TiB_2/Al MMCs wherein the particulate reinforcement is either one of very fine (<1μm) in situ and coarse (【approximately equal】10μm) 'ex situ' formed TiB_2, or both of these at equal amounts (10 vol,%). All the three have been successfully fabricated under essentially the same processing condition, and thereby our final experimental work on the measurement of temperature dependence of dynamic tensile modulus and creep tests is satisfactorily accomplished. Results are analyzed in detail in light of our micromechanics-based description of high-temperature deformation of MMCs, wherein the importance of strongly size-dependent stress relaxation of reinforcing particles is emphasized. The 'hybrid' particulate design and reactive synthesis route to fabrication is promising as advanced technology of high-temperature MMCs. Less

本研究旨在开发一种新型的颗粒陶瓷增强铝基金属基复合材料（MMCs）作为先进的高温结构材料。特别注意不同尺寸的陶瓷颗粒在常规颗粒增强金属基复合材料和弥散强化合金中的不同作用，我们计划研究，朝着新型“混合”颗粒金属基复合材料的设计，颗粒尺寸对含有细颗粒（<1μm）和粗颗粒（<1μm）中的一种或两种的MMCs的高温刚度和抗蠕变性的影响（[约等于]10μm）陶瓷颗粒。为此，本工作从Al-Ti-B混合元素粉末反应合成TiB_2 /Al金属基复合材料开始，因为这种反应粉末处理可以在铝基体中原位生成亚微米级的TiB_2颗粒。在此，我们主要涉及到一个问题，即中间形成的，经常在高温下发生的不希望的化合物Al_3Ti。 ...更多信息 在加热温度高达1000℃的常规加工条件下，研究表明，AlB_2和Al_3Ti两种中间化合物在铝液中分解，生成TiB_2和Al，即AlB_2 +Al_3Ti→ TiB_2+4Al。结果表明，制备TiB_2 /Al双相金属基复合材料的反应物组成xAl-Ti-2B（x ≥ 4）范围是合适的，临界组成x=4对应于最大27.9vol. % TiB_2。然后，工作进行到制造三种不同的20体积%的纳米颗粒。TiB_2/Al金属基复合材料中的颗粒增强体是原位生成的超细（<1μm）TiB_2和“非原位”生成的粗（约等于10μm）TiB_2中的一种，或两者等量（10体积%）。所有这三个已成功地制造基本相同的加工条件下，从而我们的最后实验工作的动态拉伸模量和蠕变试验的温度依赖性的测量是令人满意的完成。结果进行了详细的分析，根据我们的微观力学为基础的描述的金属基复合材料的高温变形，其中强调的重要性，强烈的尺寸依赖的应力松弛的增强颗粒。“混合”颗粒设计和反应合成的制备路线是有前途的高温金属基复合材料的先进技术。少

项目成果

A.Madgwick: "Steady-state creep of a composite"Mechanics of Materialia. 33. 493.-498 (2001)

A.Madgwick：“复合材料的稳态蠕变”Materialia 力学。

T.Shimoyamada: "High-temperature stiffness and creep properties of Al-TiB_2 particulate MMCs produced by reactive sintering"Proc. 3rd Japan-Korea Joint Symp. on Composite Materials. 11-12 (2002)

T.Shimoyamada：“反应烧结生产的 Al-TiB_2 颗粒 MMC 的高温刚度和蠕变性能”Proc。

T.Shimoyamada: "In situ synthesis and high-temperature properties of particulate TiB_2/Al composites"Proc.14th Int.Conf.on Composite Materials (ICCM-14) & SME Technical Paper TP03PUB295. (CD-ROM). (2003)

T.Shimoyamada：“颗粒TiB_2/Al复合材料的原位合成和高温性能”Proc.14th Int.Conf.on Composite Materials (ICCM-14)

T.Shimoyamada: "High-temperature stiffness and creep properties of Al-TiB_2 particulate MMCs produced by reactive sintering"Proc.3rd Japan-Korea Joint Symp.on Composite Materials. 11-12 (2002)

T.Shimoyamada：“反应烧结生产的 Al-TiB_2 颗粒 MMC 的高温刚度和蠕变性能”Proc.3rd Japan-Korea Joint Symp.on Composite Materials。

K.Wakashima: "In situ synthesis and properties of aluminum composites with ultrafine TiB_2 and Al_2O_3 particulates"Materials Science Forum. (to be bublished). (2004)

K.Wakashima：“超细TiB_2和Al_2O_3颗粒铝复合材料的原位合成及其性能”材料科学论坛。