ANALYSIS OF COMBUSTION SYNTHESIS PROCESS

燃烧合成过程分析

基本信息

批准号：
03453078
负责人：
MIYAMOTO Yoshinari
金额：
$ 4.03万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

The combustion synthesis processes of ceramic-based composites in the solid-solid systems of Ti-C-Ni and Ti-Si-C for the gas-pressure combustion sintering, and the solid-gas systems of Nb-N-C and Ti-N for the metal nitriding were analyzed. In the TiC-Ni composites, the measured combustion temperatures depending on Ni addition were consistent with the adiabatic combustion temperatures calculated , so that the calculated temperatures can be used as a parameter to control the combustion reaction. The influence of Ni addition to the microstructure and thermomechanical properties of the TiC-Ni composites were investigated and the functionally gradient materials of TiC/Ni were successfully fabricated by applying the results to design of graded structures.In the Ti-Si-C system, the dense materials including the quenched high -temperature forms such as Ti_3SiC_2 were fabricated under 100 MPa pressure. The Ti_5Si_3-TiC-Ti systems were fully densified, which exhibited superior mechanical propert … More ies such as flexural strength of 1115 MPa and fracture toughness of 10 MPam^<1/2>. Synthesis of the dense material of a singe phase Ti_3SiC_2 is expected by further investigations.In the Nb-N-C system, the combustion synthesis reaction of NbN_1-xCx solid solutions was sustained within x=0.8, and the solid solution powders having good crystallinity were obtained. The formation mechanism of NbN_1-xCx was clarified due to the nitriding combustion of Nb and successive carbonizing reaction at high temperature.The instantaneous nitriding process for Ti metal components has been developed from the analysis of combustion reaction of Ti-N system. The TiN layer of several micron meters is formed by the combustion of Ti powders coated on the Ti metal component in a pressurized nitrogen atmosphere of several MPa.These results indicate that a variety of ceramic based composite materials including functionally gradient materials, solid solution powders and surface nitriding of metals can be produced by controlling the combustion synthesis process of solid-solid and solid-gas systems. Less

分析了金属氮化金属氮化物中的固定系统中基于陶瓷的组合物的组合过程，以及用于气压组合烧结的Ti-C-Ni和Ti-Si-C的组合过程，NB-N-C和TI-N的实心气体系统。在TIC-NI组成中，根据添加Ni的不同，测得的组合温度与计算的绝热组合温度一致，因此可以将计算的温度用作控制燃烧反应的参数。研究了NI添加对TIC-Ni组成的微观结构和热力学特性的影响，并通过将结果应用于Ti-Si-C系统的设计，成功制造了TIC/Ni的功能梯度材料。在Ti-Si-C系统的设计中，在Ti-Si-C系统的设计中，诸如Ti_3sic _3sic _2 SiC _2 sic _2 SIC ti sic dews fustance the-ci-c系统中，包括密集的材料。 TI_5SI_3-TIC-TI系统已完全致密，它暴露了超级机械性能……更多的IE，例如1115 MPa的柔性强度和10 MPAM^<1/2>的断裂韧性。通过进一步的研究，预期新的ti_3SIC_2的致密材料的合成。在NB-N-C系统中，在X = 0.8内持续了NBN_1-XCX固溶的组合合成反应，并且获得具有良好结晶度的固体溶液粉末。由于NB的硝化混合物和高温下的成功碳化反应，阐明了NBN_1-XCX的形成机制。TI金属成分的瞬时硝化过程是通过TI-N系统的压缩反应的分析而开发的。几个微米仪的锡层是通过在加压金属成分上涂覆在多个MPA的加压氮气中的Ti粉末组合形成的。这些结果表明，这些基于陶瓷的复合材料，包括功能性梯度材料，包括功能性梯度材料，固体溶液，固体溶液，固体粉末和金属的表面硝化，可以通过控制固体和固体构造构成合成。较少的