材料导报
材料導報
재료도보
MATERIALS REVIEW
2009年
14期
48-50
,共3页
超高分子量聚乙烯%生物摩擦学性能%磨损机理%交联
超高分子量聚乙烯%生物摩抆學性能%磨損機理%交聯
초고분자량취을희%생물마찰학성능%마손궤리%교련
ultrahigh molecular weight polyethylene(UHMWPE)%biotribological property%wear mechanism%cross linked
采用热压固化成型法制得了尺寸范围在9～50μm、密度为0.9413g/cm3、相对分子量为6×106的粉末状超高分子量聚乙烯(UHMWPE)颗粒;并用γ射线平面静止辐照方法,分别用120kGy、250kGy和500kGy剂量辐照样品,辐照剂量率为5kGy/h.采用UMT-Ⅱ多功能摩擦试验机考察了不同辐射剂量下交联UHMWPE的生物摩擦学性能,采用电子扫描电镜(SEM)分析了磨损表面形貌并讨论了其磨损机理.结果表明,辐射剂量为120kGy的UHMWPE磨损率最小,随着辐射剂量的增加,摩擦系数逐渐增大,辐射交联后UHMWPE的摩擦磨损性能均优越于未辐射UHMWPE的摩擦磨损性能.
採用熱壓固化成型法製得瞭呎吋範圍在9～50μm、密度為0.9413g/cm3、相對分子量為6×106的粉末狀超高分子量聚乙烯(UHMWPE)顆粒;併用γ射線平麵靜止輻照方法,分彆用120kGy、250kGy和500kGy劑量輻照樣品,輻照劑量率為5kGy/h.採用UMT-Ⅱ多功能摩抆試驗機攷察瞭不同輻射劑量下交聯UHMWPE的生物摩抆學性能,採用電子掃描電鏡(SEM)分析瞭磨損錶麵形貌併討論瞭其磨損機理.結果錶明,輻射劑量為120kGy的UHMWPE磨損率最小,隨著輻射劑量的增加,摩抆繫數逐漸增大,輻射交聯後UHMWPE的摩抆磨損性能均優越于未輻射UHMWPE的摩抆磨損性能.
채용열압고화성형법제득료척촌범위재9～50μm、밀도위0.9413g/cm3、상대분자량위6×106적분말상초고분자량취을희(UHMWPE)과립;병용γ사선평면정지복조방법,분별용120kGy、250kGy화500kGy제량복조양품,복조제량솔위5kGy/h.채용UMT-Ⅱ다공능마찰시험궤고찰료불동복사제량하교련UHMWPE적생물마찰학성능,채용전자소묘전경(SEM)분석료마손표면형모병토론료기마손궤리.결과표명,복사제량위120kGy적UHMWPE마손솔최소,수착복사제량적증가,마찰계수축점증대,복사교련후UHMWPE적마찰마손성능균우월우미복사UHMWPE적마찰마손성능.
Specimens are made by hot-pressing solidification method. Ultrahigh molecular weight polyethylene (UHMWPE) particles with size of 9～50μm and density of 0. 9413g/cm3 ,and relative molecular weight of 6×106 are selected. Then using γ-ray plane static radicalization, the specimens are irradiated with 120kGy, 250kGy and 500kGy respectively, dosage rate is 5kGy/h. Biotribological property of different irradiation dosage of UHMWPE is investigated using UMT-Ⅱ multi-function wear instrument, the worn surfaces of UHMWPE are examined by scanning electron microscope(SEM), and its wear mechanism is analyzed. It has been found that the specimen with 120kGy dosage has the least wear rate, the coefficient of friction increasingly rises with the dosage increasing, the friction and wear properties of cross linked UHMWPE is superior to untreated UHMWPE.
