摘要
采用在合金熔体中通入氮气的方法在镁铝合金中原位生成了Al N颗粒增强相。合金微观组织的研究分析表明,Al N相不仅可通过间接氮化反应(3Mg+N_2→Mg_3N_2,Mg_3N_2+2Al→2AlN+3Mg)形成,而且可在熔体中由Al和N2直接反应形成。控制氮化反应温度在750℃,且合金熔体凝固后的快速重熔可在合金中获得分布均匀的Al N相。
In-situ synthesis of Al N-Mg composite materials by the gas bubbling method was investigated using nitrogen as the gaseous precursor in the temperature range of 700 ℃ to 800 ℃. The proofs of a direct reaction of N2 and Al to form AlN in Mg-Al alloy melt were found. Microstructure analysis confirms the formation and the uniform distribution of Al N phases in the alloy. An optimum process to form in situ Al N phase in Mg-Al based alloys has been obtained.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第1期18-22,共5页
Rare Metal Materials and Engineering
基金
the Research Fund of State Key Laboratory of Solidification Processing(NWPU),China(41-QP-2009,60-TP-2010)
National Key Basic Research Development Program of China("973"Program)(2011CB610403)
关键词
原位合成法
ALN
镁合金
形成机制
最优工艺
in-situ
AlN phase
magnesium alloy
formation mechanism
optimum process
