Oxidation of titanium carbide–graphite hetero-modulus ceramics with low carbon content: II. Physico-chemical interpretation of the ridge effect
Oxidation of titanium carbide–graphite hetero-modulus ceramics with low carbon content: II. Physico-chemical interpretation of the ridge effect
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低碳碳化钛-石墨异质模陶瓷的氧化：脊效应的物理化学解释。
DOI：
10.1016/j.jeurceramsoc.2008.04.036
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发表时间：
2008
影响因子：
5.7
通讯作者：
L. I. Shabalin
中科院分区：
文献类型：
--
作者：
I. Shabalin;D. L. Roach;L. I. Shabalin
异模量陶瓷（HMC）是陶瓷基体与具有相当低的杨氏模量的分散相的夹杂物的组合，导致具有显著改善的性能的材料。本文解释了93vol%TiC-7vol%C（石墨）HMC在400-1000°C和0.13- 65 kPa氧压下的等压-等温氧化过程中所观察到的所谓“脊效应”。在本研究的第一部分中建立的脊温度和脊氧压的含义，这是作为流行的氧化机制之间的边界的唯象动力学模型，被认为是基于X射线衍射（XRD）和显微镜分析。的氧化机制，本质上不同的温度和氧气压力的研究范围内确定根据开发的一般模型。这些结果可用于在恶劣环境（例如化学活性、高焓气流）中应用的难熔碳化物-碳HMC部件表面上制备特殊保护涂层。
Hetero-modulus ceramics (HMC) present the combination of a ceramic matrix with the inclusions of a dispersed phase with considerably lower Young's modulus, resulting in a material with significantly improved properties. An interpretation of the so-called “ridge effect” observed during the isobaric-isothermal oxidation of 93vol% TiC–7vol% C (graphite) HMC at temperatures of 400–1000°C and oxygen pressures of 0.13–65kPa is given. Established in Part I of this study, the meanings of a ridge temperature and ridge oxygen pressure, which are served as boundaries between prevailing oxidation mechanisms in phenomenological kinetics model, are considered on the basis of X-ray diffraction (XRD) and microscopy analyses. The oxidation mechanisms, essentially different within the studied ranges of temperatures and oxygen pressures are identified according to the developed general model. These results can be used for the preparation of special protective coatings on the surface of refractory carbide–carbon HMC parts applied in severe environments, e.g. chemically active, high-enthalpy gaseous flows.
影响因子：
3.3
作者：
Zhang, J;Li, MJ;Li, C
通讯作者：
Li, C