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Trans. Nonferrous Met. Soc. China 28(2018) 1061-1072 Effect of Si addition and applied pressure on microstructure and tensile properties of as-cast Al-5.0Cu-0.6Mn-1.2Fe alloys Wei-wen ZHANG, Yu-liang... 510641, China Received 29 January 2017; accepted 22 May 2017 Abstract: The effects of Si addition and applied pressure on the microstructure and tensile properties of as-cast Al-5.0Cu-0.6Mn- 1.2Fe alloys......
于Ti2AlC的生成,而有利于Ti3AlC2的生成机理,说明了掺Si后固溶体的产生过程. 关键词:硅掺杂；放电等离子烧结；Ti2AlC/Ti3AlC2；理论分析 中图分类号:TQ 174 文献标识码:A Synthesis of Ti2AlC/Ti3AlC2with Si doping by spark plasma...文章编号:1004-0609(2007)04-0511-07 Si掺杂放电等离子合成Ti2AlC/Ti3AlC2材料及理论分析 王 苹1, 2,梅炳初2,闵新民1,洪小林2,周卫兵2,严 明2 (1. 武汉理工大学 理学院,武汉 430070; 2. 武汉理工大学 材料复合新技术国家重点实验室,武汉 430070) 摘 要:以Ti粉,Al粉,活性炭和......
度等力学性能的提高,这一问题还未见系统研究.不仅如此,活塞,汽缸等零部件不但要考虑强度,硬度,耐磨性特别是高温耐磨性也是重要的力学性能指标.目前高硅Al-Si合金的耐磨性研究较少,高温条件下的研究更少[8],并且Al-Si合金的摩擦磨损行为与Si相形貌,尺寸,分布间的关系一直存在意见分歧[9],如LIU等[10]和孙淑红等[11]均发现Sr或P变质处理后合金的耐磨性明显改善,但CLEGG等[12...化Al-25Si合金获得不同组织形态,研究不同Si相形貌和组织形态条件下的力学行为变化. 1 实验 1.1 试验原料 试验所用的原料为纯度为99.7%(质量分数,下同)的工业纯铝锭,纯度为99.9%的高纯硅,变质剂采用山东吕美熔体技术有限公司生产的Al-3P和Al-10Sr中间合金. 1.2 试验工艺流程 将铝锭在中频感应炉中熔化,升温至750 ℃左右时按所需比......
Trans. Nonferrous Met. Soc. China 23(2013) 2962-2970 Si-doped diamond films prepared by chemical vapour deposition Yu-xiao CUI1, Jian-guo ZHANG1, Fang-hong SUN1,2, Zhi-ming ZHANG1,2 1. School... Abstract: The effects of Si doping on morphology, components and structure characteristics of CVD diamond films were studied. Si-doped CVD diamond films were deposited on Si substrate by adding......
Mn和Si对Fe-0.6C钢中珠光体-奥氏体相变的影响李昭东1,宫本吾郎2,杨志刚1,张玉朵2,张弛2,古原忠-1(1.北京市清华大学材料科学与工程系先进材料教育部重点实验室2.东北大学 金属材料研究所)摘 要:通过盐浴热处理实验,研究了Fe-0.6C二元合金和Fe-0.6C-1M/2M三元合金(质量分数,%,M为Mn和Si)在1073 K下的组织演化和相变动力学.结果表明,Fe-0.6C合金在1073 K保温约5.5 s完成珠光体→奥氏体转变,珠光体中渗碳体先于铁素体转变成奥氏体;添加1%Si减缓了奥氏体化速率,但未改变渗碳体先消失的特征;添加1%-2%Mn略微缩短了奥氏体转变完成时间,但珠光体中渗碳体和铁素体几乎同时完成奥氏体转变.在C扩散控制长大的假设下,奥氏体在单个珠光体片层间的一维长大模拟结果表......
). With the increase of Si content, the as-cast microstructure of alloy changes from Widmanstatten into dendrite. The addition of Si obviously improves the oxidation resistance of the alloys. The action... with different Si contents 表2 退火态合金组成相的平均成分 Table 2 Average composition of phases in annealed alloy 图2 退火态合金的XRD谱 Fig. 2 XRD patterns of alloys after annealing 2.2 硅对合金......
the nucleation of Al3(Sc,Zr) precipitates in dilute Al-Sc-Zr alloys[J]. Acta Materialia, 2012, 60(12): 4740-4752. [11] VO N Q, DUNAND D C, SEIDMAN D N. Effect of Si micro-addition on creep resistance... tests systematically. The results show that the addition of Si promotes to form more Er-rich primary phases in as-cast alloys, which enhances hardness but obviously decreases electrical conductivity......
, the primary Si of coarse size and sphere-like shape in LSS alloy produced a lower interface area [10] than the fine and irregular Si particle in SD alloy. In addition, the continuous distribution of Al...积法(SD)制备的Al-45%Si合金组织和性能进行研究.结果表明,两种方法制备的合金中初生Si相具有不同的尺寸,形态和分布,从而对合金性能产生不同的影响.采用喷射沉积法制备的合金中硅相形状不规则,尺寸细小并在空间连续分布.液固分离法制备的合金中硅相形态呈近球形,尺寸较大并被连续的铝基体包覆.与喷射沉积合金相比,液固分离制备合金具有更高的热导率和更低的低温热膨胀系数,但由于硅颗粒尺寸较大,力学性能......
Trans. Nonferrous Met. Soc. China 26(2016) 1775-1782 Effects of Si addition on microstructure, mechanical and thermal fatigue properties of Zn-38Al-2.5Cu alloys Ting LIU, Nai-chao SI, Guang-lei LIU... of the Si addition. Zn-38Al-2.5Cu-0.55Si alloy shows the dramatically refined microstructure and the best mechanical properties. When the Si addition exceeds 0.55%, α dendrites develop and Si phases......
residual phase LaNi3. The addition of Si results in a decrease in (La, Mg)2Ni7 phase and an increase in LaNi5 phase without changing the phase structure of the alloys. What is more, it brings on an obvious... electrodes is mainly attributed to the pulverization of the alloy particles and the oxidation/corrosion of the elements Mg and La [12]. Therefore, we expect that the addition of Si can strengthen......
