(1. 中國(guó)南方航空股份有限公司，廣州 510406；
2. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 以h-BN、石墨、短切PAN炭纖維和酚醛樹(shù)脂為原料，采用單向模壓結(jié)合呋喃樹(shù)脂浸漬炭化技術(shù)制備C/C-BN復(fù)合材料。在M2000型實(shí)驗(yàn)機(jī)上測(cè)試不同取向的C/C-BN試樣與表面鍍Cr的40Cr鋼配副時(shí)的摩擦磨損行為。結(jié)果表明：在平行于壓制方向的試樣(試樣1)中，抗壓強(qiáng)度達(dá)82.43 MPa，高于垂直于壓制方向試樣(試樣2)的(51.47 MPa)。摩擦實(shí)驗(yàn)結(jié)果表明：隨載荷增加，試樣1、試樣2的摩擦因數(shù)均先增加后降低，試樣1的摩擦因數(shù)在120 N時(shí)達(dá)到峰值0.157，而試樣2在100 N時(shí)達(dá)到峰值0.152；隨載荷增加，試樣1的體積磨損除150 N外，基本為增加態(tài)勢(shì)，最高達(dá)2.07 cm3；而試樣2的體積磨損則呈現(xiàn)三段式增加趨勢(shì)，最高值為1.66 cm3。SEM形貌表明，在實(shí)驗(yàn)后，試樣1的摩擦膜更完整、致密。其中，在60 N時(shí)，試樣1的摩擦膜表層因粘著發(fā)生卷曲撕裂，而試樣2則形成了網(wǎng)絡(luò)狀裂紋。
關(guān)鍵字: C/C-BN；模壓；摩擦特性；復(fù)合材料
（1. China Southern Airlines Company Limited, Guangzhou 510406, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:C/C-BN composite was prepared by mono-directional mold-pressing combined with funan-resin impregnated and carbonization using h-BN, graphite, short-cut PAN-fiber and phenolic-resin as raw materials. The sliding friction behavior of the samples with different orientations of C/C-BN against 40Cr steel ring coated with Cr was investigated in M2000 tester. The results show that the compress strength of samples consistent with pressing-direction (sample 1) is 82.43MPa, which is higher than that of the other samples with different orientation (sample 2) of 51.47 MPa. The friction results show that the coefficient of friction (COF) of two kinds of samples increase at first and then decrease with the increase of load. The highest COF value of sample 1 is 0.157 at 120 N, while that of sample 2 is 0.152 at 100 N. The volume wear loss of sample 1 increases with the increase of load which reaches the highest value of 2.07 cm3 at 200 N except that at 150 N, but that of sample 2 show a three-stage increase which reaches the highest value of 1.66 cm3 at 200 N. SEM images show that sample 1 has more integrated worn surface than sample 2 at the same tested-load. Some friction film of sample 1 is tore and curled at 60 N, while that of sample 2 has some network cracks.
Key words: C/C-BN; mould pressing; friction characteristic; composites
