张雪辉,林晨光,崔舜,李增德,胡晓康

• 1:北京有色金属研究总院

摘要(Abstract)：

采用放电等离子烧结(SPS)技术制备了Al2O3-弥散强化铜合金,对SPS烧结过程及机理进行了探讨,并利用SEM、TEM、XRD等测试技术对合金显微组织及原位生成的Al2O3弥散相的相结构进行了观察分析,结果表明:SPS烧结过程主要是由烧结颈形成初期、烧结颈长大粗化期以及完全致密化时期3个阶段组成,不同阶段之间没有明确的分界线,各阶段其作用机制不同;烧结过程中共有3个放气峰存在,分别对应于水蒸气的脱除、低温氧的脱附和表层吸附气体去除、高温及外部压力情形下氧的脱附及合金内部气体的排除;合金中原位生成了大小为25 nm,间距为50 nm,呈均匀弥散分布的γ-Al2O3质点,钉扎位错和晶界,对基体产生弥散强化和抑制再结晶作用。

关键词(KeyWords)： 放电等离子烧结;弥散强化铜;显微组织;孪晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(5043202)

作者(Author): 张雪辉,林晨光,崔舜,李增德,胡晓康

DOI: 10.13289/j.issn.1009-6264.2013.11.001

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