本文關(guān)鍵詞：碳纖維酚醛樹脂基復(fù)合材料的制備及摩擦磨損性能的研究　出處：《長(zhǎng)春工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 碳纖維 酚醛樹脂 摩擦系數(shù) 磨損率 官能團(tuán) 石墨 PEEK

【摘要】：碳纖維摩擦材料具有減磨自潤(rùn)滑,耐磨,耐化學(xué)腐蝕,減震吸振,降低噪聲,密度小,比強(qiáng)度高和加工簡(jiǎn)單等優(yōu)良特性,這不僅解決了金屬材料難以克服的技術(shù)問(wèn)題,提高了機(jī)械設(shè)備的使用可靠性,而且還改善了機(jī)械結(jié)構(gòu)的技術(shù)參數(shù),節(jié)約了大量的貴金屬材料,降低了機(jī)械設(shè)備的總體重量,總體的制造成本得到了降低,繼而碳纖維摩擦材料已經(jīng)成為21世紀(jì)的新型摩擦材料。本文主要研究,用濃硝酸和硅烷偶聯(lián)劑(KH550)對(duì)PAN基碳纖維(3K)進(jìn)行表面改性,以酚醛樹脂為基體,石墨和PEEK粉末作為摩擦性能調(diào)節(jié)劑,利用熱壓成型制備工藝,制備出碳纖維酚醛樹脂基復(fù)合材料。通過(guò)掃描電子顯微鏡(SEM),傅里葉變換紅外光譜(FTIR),和X射線光電子能譜(XPS)對(duì)碳纖維的結(jié)構(gòu)和表面特性進(jìn)行研究。通過(guò)拉伸試驗(yàn)機(jī)對(duì)復(fù)合材料進(jìn)行拉伸強(qiáng)度測(cè)試,通過(guò)MVF-1A型多功能立式摩擦磨損試驗(yàn)機(jī)對(duì)復(fù)合材料進(jìn)行摩擦磨損測(cè)試。結(jié)果表明,通過(guò)濃硝酸和偶聯(lián)劑處理后,可以提高碳纖維表面的粗糙度和化學(xué)活性,改善碳纖維與酚醛樹脂基體之間的界面結(jié)合,進(jìn)而提高了此復(fù)合材料的拉伸性能,降低了材料的磨損率。濃硝酸處理碳纖維時(shí)間3h,加入硅烷偶聯(lián)劑,所制備的復(fù)合材料拉伸強(qiáng)度為85.79MPa,摩擦系數(shù)為0.18,磨損率為3.056×10-6g(N·m)-1基體中加入石墨后,復(fù)合材料的摩擦系數(shù)和磨損率都降低,當(dāng)基體中添加15wt%石墨時(shí),材料的摩擦系數(shù)為0.1,磨損率為0.37×10-6g(N·m)-1,復(fù)合材料表現(xiàn)出摩擦學(xué)性能的速度穩(wěn)定性和接觸壓力穩(wěn)定性。基體中加入PEEK粉末后,復(fù)合材料摩擦系數(shù)升高,磨損率降低。當(dāng)向基體中添加10wt%PEEK粉末時(shí),材料的摩擦系數(shù)為0.28,磨損率為0.92×10-6g(N·m)-1,材料的摩擦系數(shù)最穩(wěn)定,當(dāng)加入15wt%時(shí),復(fù)合材料的摩擦系數(shù)達(dá)到了0.35,表現(xiàn)出純PEEK的摩擦特性,摩擦系數(shù)波動(dòng)較大,不穩(wěn)定。復(fù)合材料表現(xiàn)出摩擦學(xué)的速度穩(wěn)定性和在較高負(fù)載壓力下的摩擦學(xué)接觸壓力穩(wěn)定性。
[Abstract]:Carbon fiber friction material has the advantages of anti-wear self-lubrication, abrasion resistance, chemical corrosion resistance, vibration absorption, noise reduction, low density, high specific strength and simple processing. This not only solves the difficult technical problems of metal materials and improves the reliability of mechanical equipment, but also improves the technical parameters of mechanical structure and saves a lot of precious metal materials. Reduce the total weight of mechanical equipment, the overall manufacturing cost has been reduced, then carbon fiber friction material has become a new type of friction materials in 21th century. The surface of PAN based carbon fiber was modified with concentrated nitric acid and silane coupling agent KH 550. Phenolic resin was used as matrix and graphite and PEEK powder as friction modifier. Carbon fiber phenolic resin matrix composites were prepared by hot pressing technology, and were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The structure and surface properties of carbon fiber were studied by X-ray photoelectron spectroscopy (XPS). The tensile strength of the composites was tested by tensile testing machine. The friction and wear tests of the composites were carried out by MVF-1A multifunctional vertical friction and wear tester. The results showed that the composites were treated with concentrated nitric acid and coupling agent. It can improve the surface roughness and chemical activity of carbon fiber, improve the interfacial bonding between carbon fiber and phenolic resin matrix, and then improve the tensile properties of the composite. The tensile strength and friction coefficient of the composites were 85.79 MPA and 0.18 respectively, and the tensile strength was 85.79 MPA and the friction coefficient was 0.18 when the carbon fiber was treated with concentrated nitric acid for 3 h and silane coupling agent was added. The friction coefficient and wear rate of the composites decreased with the addition of graphite to the matrix of 3.056 脳 10 ~ (-6) g ~ (-6) g ~ (-1) N 路m ~ (-1), when 15 wt% graphite was added to the matrix. The friction coefficient of the material is 0.1 and the wear rate is 0.37 脳 10 ~ (-6) g ~ (-1) N 路m ~ (-1). The friction coefficient of the composites increased with the addition of PEEK powder. The friction coefficient and wear rate of the material were 0.28 and 0.92 脳 10 ~ (-6) g / m ~ (-1), respectively, when the peek powder was added to the substrate for 10 wts. the friction coefficient was 0.28 and the wear rate was 0.92 脳 10 ~ (-6) g / m ~ (-1). The friction coefficient of the composites reached 0.35 when the material was added 15wt%, showing the friction characteristics of pure PEEK, and the friction coefficient fluctuated greatly. Instability. The composites exhibit tribological velocity stability and tribological contact pressure stability under higher load pressure.
【學(xué)位授予單位】：長(zhǎng)春工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33

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