Physica B-Condensed Matter
The influence of preparation parameters on the particle size of nanosized silicon (n-Si) produced by laser-induced chemical vapour deposition (LICVD) was studied. The optimum parameters for synthesizing the right sized n-Si have been obtained, and they are as follows. The power density of CO2 laser ...
关键词:
powders
Acta Materialia
The microstructure of TiNi(or Ni)/TiC composite prepared by mechanical alloying (MA) of elemental Ti, Ni and C powders has been investigated in detail. The result shows that large agglomerates with size 3-10 mm were abruptly formed for Ti50Ni20C30, Ti40Ni40C20 and Ti30Ni50C20 powders at the milling ...
关键词:
powders
Journal of Materials Research
The explosive reactions or self-propagating high temperature synthesis (SHS) take place during milling Ni20Ti50C30 and Ni50Ti30C20 elemental powder mixtures, The coexistence of agglomerates and powders in products indicates the occurrence of melting and solidification, TiC phase and NiTi compound we...
关键词:
powders
刘学建
,
李会利
,
黄政仁
,
王士维
,
江东亮
无机材料学报
doi:10.3724/SP.J.1077.2009.01159
以Al_2O_3和AlN为原料, 在氮气气氛下通过高温固相反应工艺合成氮氧化铝(AlON)粉体, 借助XRD分析系统研究了反应温度、保温时间及原料配比等工艺参数对反应产物相组成的影响并探讨了反应机理. 研究结果表明:该反应主要受热力学控制, 动力学因素也具有重要作用, 反应温度和保温时间对AlON粉...
关键词:
氮氧化铝(AlON)
,
粉体
,
固相反应
,
反应动力学
,
反应机理
龙文彪
,
罗瑞盈
合成材料老化与应用
以Vb(NO3)3·5H2O和TEOS为初始原料采用溶胶凝胶工艺制备Yb2Si2O7粉体,研究了乙醇的含量对溶胶凝胶过程和粉体粒径形貌的影响,并通过X射线衍射分析、热重差热分析及拉曼光谱分析对凝胶的相转变和热历程进行分析.研究表明,乙醇含量增加,粉体粒径减小,粒度均匀,溶胶凝胶时间延长;Yb(NO3...
关键词:
Yb2Si2O7
,
溶胶凝胶工艺
,
粉体
,
制备
,
表征
