外文翻譯---碳結(jié)構(gòu)和固體顆粒侵蝕的保護(hù)高度多孔炭碳復(fù)合保溫材料的使用-材料科學(xué)(存儲版)
【正文】 ,作為碳和氮的前身為載體氣體。 韌性材料往往表現(xiàn)出最大的侵蝕在 瞬間 角度的影響 ,大約 30176。 調(diào)查顯微組織、力學(xué)性能和熱性能 ， 這些材料被 運(yùn)用 。對于這種材料 ,兩種機(jī)制是有效的 :破壞石墨薄片 ， 這主要是由機(jī)械 性的 鎖在一起 ，和像耕田一樣的機(jī)制。40 lm) are found between the layers of woven cloth, as can be seen in the plan section micro graph in Fig. 3b. This may result from the use of a highviscosity resin or a low impregnation pressure. 外文資料譯文 碳結(jié)構(gòu)和固體顆粒侵蝕的保護(hù)高度多孔炭碳 復(fù)合保溫材料的使用 材料系，英國皇家理工學(xué)院，技術(shù)和醫(yī)學(xué)，倫敦 SW7 2BP,英國 多粒子侵蝕進(jìn)行了測試 備用 涂料 ,( 膠狀石墨油漆 )和 電鍍 （ 密集的碳 — 亞邦復(fù)合材料和石墨信息 ） 用來保護(hù)多孔碳材料 — 碳復(fù)合保溫在真空和惰性 氣體 熔爐 ,利用惰性氣體淬火 。, 60176。 for metals, and material removal is thought to occur by a micromachining mechanism with a contribution of deformation wear at higher angles. On the other hand, for brittle materials, maximum erosion is found where the erodent stream is perpendicular to the erosion surface, and material removal typically results from the formation of Hertzian or lateral cracks . Although it is a convenient approach to idealize materials erosion behaviour in this manner, it is an oversimplification, because erosion is found to depend on other factors, including the erosion conditions, such as erodent par ticle size and shape, as well as the details of the microstructure of the target material . This paper is concerned with the examination of the microstructure and the efectiveness in improving the erosion resistance of several candidate coatings and claddings. The results presented involve the steady state erosion rate as a function of impingement angle under defined conditions. The overall aim of this work is to relate the microstructure to the erosion data by means of a mechanistic approach .materials included the Fiber Materials Inc. C3 posite], which is resin impregnated, and the Toyo Tanso G3470 . In addition, a highdensity carbon— carbon posite was produced by employing CVD over a period of 800 h to infiltrate a 5 mm thick section of the CBCF substrate to a density of 1 Mg m\3. The CVD process used natural gas as the carbon precursor and nitrogen as the carrier gas. The densification was carried out at approximately 1100 176。 Microstructure and solid particle erosion of carbon based materials used for the protection of highly porous carboncarbon posite thermal insulation R. I. BAXTER, R. D. RAWLINGS Department of Materials, Imperial College of Science, Technology and Medicine, London SW7 2BP, UK Multiparticle erosion tests were performed on candidate coating (colloidal graphite paints) and cladding (dense carbonc— arbon posites and graphite foil) materials employed to protect porous carbon— carbon posite thermal insulation in vacuum and inertgas furnaces that utilize inert gas quenching. The dependence of the erosion rate on the angle of incidence of the erodent was examined and related to the microstructure and the mechanisms of material removal as observed by SEM. In addition, the effect of a thin chemical vapour deposited (CVD) carbon layer on top of a colloidal graphite paint coating and a graphite foil clad was investigated. The coating and cladding materials displayed a greater erosion resistance at all angles of incidence pared to the porous carbon— carbon posite. In general, the greatest erosion rate was found at an angle of incidence of 901
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