Microstructural Control Carbon Materials by Addition of Inorganic Compounds into a Precursor and Chemical/Mechanical Properties Improvement

通过在前体中添加无机化合物来控制碳材料的微观结构并改善化学/机械性能

• 批准号: 08455297
• 负责人: TANABE Yasuhiro
• 金额: $ 1.54万
• 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: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455297/
• 关键词: Carbon Precursor; Inorganic Compound Addition; Microstructural Control; Chemical Properties; Mechanical Properties; Vickers Indentation

Microstructure of carbon materials can be controlled by addition of carbonaceous particles into carbon precursors. Oxidation weight loss of the carbon materials depends on their microstructures, and the oxidation progresses un-uniformly in the materials. Un-uniform oxidation can be detected by Vicker's indentation technique : using the area surrounding between loading and unloading curves in indentation depth to load relationships. This area corresponds to the energy dissipated in materials, This energy is variable depending on the maximum indentation load, However, the energy corrected by the maximum indentated volume shows no-load dependence, and clearly explains increasing oxidation areas and decreasing resistance against indentation fracture. It is obvious that this technique can be applicable to analyze un-uniform oxidation behavior, which is usual in carbon material's oxidation, very precisely.Oxidation rate of carbon materials including inorganic compounds at 700 to 1000 。C in air depends on the compounds. Precise analysis of oxidation behavior using TK (Transient Kinetics) reveals that more than two types of active sites possibly exist in carbon materials and that some elements, in this case Ta and Ti, can disactive a type of active sites. C/C composites can be prepared by using this type of matrix, and only small decreasing in shear strength is observed.Above results indicate that carbon materials having high oxidation resistance and low strength decreasing can be prepared in this study. Moreover, a technique, by which un-uniform oxidation in a material can be quantitatively analyzed, is proposed.

在碳前驱体中加入碳质颗粒可以控制碳材料的微观结构。碳材料的氧化失重取决于其微观结构，并且在材料中氧化过程不均匀。不均匀氧化可以通过维氏压痕技术检测：使用压痕深度的加载和卸载曲线之间的周围区域来检测加载关系。该区域对应于材料中耗散的能量，该能量随最大压痕载荷而变化，然而，由最大压痕体积修正的能量显示空载依赖性，并清楚地解释了氧化面积增加和抗压痕断裂阻力降低的原因。显然，该技术可以非常精确地分析碳材料氧化过程中常见的不均匀氧化行为。含碳材料（包括无机化合物）在700 ~ 1000时的氧化率。空气中的C取决于化合物。利用瞬态动力学（TK）对碳材料的氧化行为进行精确分析表明，碳材料中可能存在两种以上的活性位点，并且某些元素（在这种情况下是Ta和Ti）可以使一种活性位点失活。采用该基体可制备C/C复合材料，抗剪强度下降幅度较小。以上结果表明，本研究可以制备出高抗氧化性和低强度下降的碳材料。此外，还提出了一种定量分析材料中不均匀氧化的技术。

项目成果

Y.TANABE et al.: "Shear Strength of C/C Composites Containing an Inorganic Compound Effective for Anti-oxidation" Journal of Materials Science Letters. (in press). (1997)

Y.TANABE 等人：“含有有效抗氧化无机化合物的 C/C 复合材料的剪切强度”材料科学快报杂志。

Y.Ishiguro et al: "Effect of Double Notched Specimen onfiguration on the Shear Strength of C/C Composites" Materials Science and Engineering Serving Society. 285-288 (1998)

Y.Ishiguro 等人：“双缺口样品配置对 C/C 复合材料剪切强度的影响”材料科学与工程服务协会。

K.Hoshi et al: "Effects of Sonication on Curing Process in Furan Resin" TANSO. 1998. 199-201 (1998)

K.Hoshi 等人：“超声处理对呋喃树脂固化过程的影响”TANSO。

E.YASUDA et al.: "The Influence of Inorganic Compounds Addition on the Microstructure and Shear Strength of C/C Composite" Proceedings of Pac-Rim 2. (in press). (1997)

E.YASUDA 等人：“添加无机化合物对 C/C 复合材料的微观结构和剪切强度的影响”，Pac-Rim 2 号论文集（出版中）。

D.Tahara et al: "Vickers Indentation Behavior of Air-oxidized Carbon Materials" Abst.of the 37th Basic Research of Ceramic Soc.Japan. 284-285 (1999)

D.Tahara 等人：“空气氧化碳材料的维氏压痕行为”日本陶瓷学会基础研究第 37 届摘要。