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将石墨纤维分别在氢气和氩气气氛下加热到900、1200、1500和1800℃保温4 h,测试石墨纤维在两种气氛下高温处理后的性能,用SEM和XRD观察和分析石墨纤维高温处理后的组织与形态。通过对比石墨纤维与钛锆钼(TZM)合金相应的性能,分析石墨纤维作为TZM合金增强体的可行性。结果表明,石墨纤维在氢气气氛下会被烧蚀而形成甲烷气体,在氩气气氛下则具有优良的热稳定性,即使长时间高温处理也不会使纤维微晶尺寸及组织发生较大变化,因此,石墨纤维可以用作TZM合金增强体。
The graphite fibers were heated to 900, 1200, 1500 and 1800 ℃ for 4 h under hydrogen and argon respectively. The properties of graphite fibers after high temperature treatment were tested under two atmospheres. The graphite fibers were observed and analyzed by SEM and XRD. After the organization and form. By comparing the performance of graphite fiber with titanium-zirconium-molybdenum (TZM) alloy, the feasibility of graphite fiber as TZM alloy reinforcement was analyzed. The results show that graphite fibers can be ablated to form methane gas under hydrogen atmosphere and excellent thermal stability under argon atmosphere. Even if prolonged high temperature treatment, the size and structure of fiber crystallites will not change greatly Therefore, graphite fibers can be used as TZM alloy reinforcements.