工程科学学报
工程科學學報
공정과학학보
Journal of University of Science and Technology Beijing
2015年
5期
81-85
,共5页
李贺%尹海清%易善杰%DilFarazKhan%曹慧钦%张桐%曲选辉
李賀%尹海清%易善傑%DilFarazKhan%曹慧欽%張桐%麯選輝
리하%윤해청%역선걸%DilFarazKhan%조혜흠%장동%곡선휘
金属基复合材料%氧化物弥散强化%铜%氧化铝%高速压制%烧结温度%导电率
金屬基複閤材料%氧化物瀰散彊化%銅%氧化鋁%高速壓製%燒結溫度%導電率
금속기복합재료%양화물미산강화%동%양화려%고속압제%소결온도%도전솔
metallic matrix composites%oxide dispersion strengthening%copper%alumina%high velocity compaction%sintering temperature%electrical conductivity
弥散强化铜材料具有高强度和高导电性的特性,孔洞是影响导电率的重要因素.本文采用高速压制成形技术,对Al2 O3质量分数为0.9%的弥散强化铜粉压制成形,研究了压制速度对生坯的影响.当压制速度为9.4 m·s-1时得到密度为8.46 g·cm-3的生坯.研究了烧结温度对烧结所得Al2 O3弥散强化铜试样导电率的影响.当生坯密度相同时,烧结温度越高,所得试样的导电率也越高.断口与金相分析表明:烧结温度为950℃时,烧结不充分,颗粒边界以及孔洞多而明显,孔洞形状不规则;烧结温度为1080℃时,颗粒边界消失,孔洞圆化,韧窝出现,烧结坯的电导率为71.3%IACS.
瀰散彊化銅材料具有高彊度和高導電性的特性,孔洞是影響導電率的重要因素.本文採用高速壓製成形技術,對Al2 O3質量分數為0.9%的瀰散彊化銅粉壓製成形,研究瞭壓製速度對生坯的影響.噹壓製速度為9.4 m·s-1時得到密度為8.46 g·cm-3的生坯.研究瞭燒結溫度對燒結所得Al2 O3瀰散彊化銅試樣導電率的影響.噹生坯密度相同時,燒結溫度越高,所得試樣的導電率也越高.斷口與金相分析錶明:燒結溫度為950℃時,燒結不充分,顆粒邊界以及孔洞多而明顯,孔洞形狀不規則;燒結溫度為1080℃時,顆粒邊界消失,孔洞圓化,韌窩齣現,燒結坯的電導率為71.3%IACS.
미산강화동재료구유고강도화고도전성적특성,공동시영향도전솔적중요인소.본문채용고속압제성형기술,대Al2 O3질량분수위0.9%적미산강화동분압제성형,연구료압제속도대생배적영향.당압제속도위9.4 m·s-1시득도밀도위8.46 g·cm-3적생배.연구료소결온도대소결소득Al2 O3미산강화동시양도전솔적영향.당생배밀도상동시,소결온도월고,소득시양적도전솔야월고.단구여금상분석표명:소결온도위950℃시,소결불충분,과립변계이급공동다이명현,공동형상불규칙;소결온도위1080℃시,과립변계소실,공동원화,인와출현,소결배적전도솔위71.3%IACS.
Oxide dispersion strengthening ( ODS) copper has the characteristics of both high strength and high conductivity. The porosity is an important factor influencing the electrical conductivity. 0. 9Al2 O3/Cu powder was compacted by a high velocity compac-tion ( HVC) technique. The influence of impact velocity on the green density of Al2 O3 dispersion strengthening copper was studied, and the green density of 8. 46 g·cm-3 was got at the impact velocity of 9. 4 m·s-1 . The dependence of the electrical conductivity on sin-tering temperature was investigated. The results from sintering steps showed that the higher the sintering temperature was, the higher the electrical conductivity was at the same green density level. Fracture surface and SEM observations indicated that the samples were inadequately sintered at the sintering temperature of 950℃, with particle boundaries and some pores being visible obviously. When the sintering temperature rose up to 1080℃, the pores tended to spheroidize, the particle boundaries disappeared, and the dimples ap-peared on the fracture surface, showing a typical plastic fracture characteristic. The electrical conductivity of the sintered compacts was measured to be 71. 3%IACS.