本文選題：生物SiC陶瓷 + 苧麻纖維　； 參考：《西安工程大學(xué)》2015年碩士論文

【摘要】：近年來隨著科技的發(fā)展,生物Si C陶瓷受到了越來越多研究人員的關(guān)注。這是因為生物Si C陶瓷具有高氣孔率、耐摩擦、耐腐蝕以及良好的化學(xué)穩(wěn)定性等優(yōu)點。制備生物Si C陶瓷的原料來源非常廣泛,可利用自然界中的竹材、木材、高粱、小米以及經(jīng)過人工加工的紙張、單纖維板等材料,廣泛的原料來源使得制備生物Si C陶瓷的成本非常低廉。本文從低成本、合理利用自然資源以及環(huán)境保護的角度出發(fā)。利用在我國有著豐富含量的苧麻纖維為原料,在高溫真空環(huán)境下制備出具有苧麻纖維織物組織的Si C陶瓷,本文研究了成型溫度以及燒結(jié)助劑對所制備樣品成型的影響。測試了樣品的各項物理性能,并且利用X射線衍射儀、掃描電子顯微鏡和EDS能譜分析儀對樣品的物相組成以及微觀組織結(jié)構(gòu)進行了深入研究與分析。通過分析可知在真空環(huán)境下制備的苧麻纖維織物Si C陶瓷,隨著成型溫度的上升顯氣孔率逐漸增大,樣品密度逐漸減小,抗彎強度逐漸減小。通過實驗制得樣品的主晶相為β-Si C,很好的保留了苧麻纖維織物的微觀形貌。隨著溫度上升苧麻纖維織物Si C陶瓷中雜質(zhì)的含量逐漸減少,纖維之間的填充物逐漸減少,同時從形貌上可以看出在1500℃下Si C形貌更為圓潤。經(jīng)過HF腐蝕之后的樣品,剩下較為純凈的Si C陶瓷,雜質(zhì)成分基本被除去。在摻雜燒結(jié)助劑后制備的苧麻纖維織物Si C陶瓷未檢測到雜質(zhì)成分,通過測試分析可知添加了Al2O3-Y2O3-Mg O時樣品的致密性、抗彎強度及微觀形貌最為良好。通過對實驗樣品的測試分析可知,在制備工藝相同的情況下1500℃時雜質(zhì)成分最少,所形成的Si C晶粒形貌最為良好。在相同溫度下添加燒結(jié)助劑的樣品性能更為良好,且多元燒結(jié)助劑的效果優(yōu)于二元燒結(jié)助劑。
[Abstract]:In recent years, with the development of science and technology, more and more researchers pay attention to biological sic ceramics. This is due to the high porosity, friction resistance, corrosion resistance and good chemical stability of bioceramics. Biological sic ceramics can be made from a wide range of raw materials, such as bamboo, wood, sorghum, millet, artificial paper, single fiberboard and so on. A wide range of raw materials make the cost of preparing biological sic ceramics very low. This article starts from the angle of low cost, rational utilization of natural resources and environmental protection. Using Ramie fiber with abundant content as raw material, sic ceramics with Ramie fabric structure were prepared in high temperature and vacuum environment. The effects of molding temperature and sintering aids on the molding of the samples were studied in this paper. The physical properties of the samples were tested, and the phase composition and microstructure of the samples were studied and analyzed by X-ray diffractometer, scanning electron microscope and EDS spectrometer. The results show that the porosity, density and bending strength of Ramie fabric sic ceramics prepared in vacuum environment gradually increase with the increase of molding temperature. The main crystal phase of the sample was 尾 -Si C, which retained the microstructure of Ramie fabric. With the increase of temperature, the content of impurities in sic ceramics of Ramie fiber fabric decreases gradually, and the fillers between fibers decrease gradually. At the same time, it can be seen from the morphology that the morphology of sic is more rounded at 1500 鈩，

本文編號：1873278