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| 1 | 细化变质处理对A356.1合金组织和力学性能的影响显示文摘通过光学显微镜(OM)、扫描电镜(SEM)、拉伸性能测试和DSC差热分析等方法系统研究Al-5Ti-1B、Sr、La、Ce对A356.1铝合金组织和性能的影响。结果表明:Al-5Ti-1B对A356.1合金中初生α(Al)晶粒的细化作用十分显著,而对共晶硅和富铁相没有明显变质作用。Sr能有效地将A356.1合金中粗大、狭长的板条状转变为细小的颗粒状和短纤维状,从而大幅降低共晶硅的长度,并显著改善共晶硅的形状系数,但对初生α(Al)相和富铁相没有明显的细化变质作用。La、Ce对A356.1合金中初生α(Al)、共晶硅和富铁相均有一定的细化变质作用,但细化效果远不及Al-5Ti-1B,变质效果明显不如Sr。加入RE元素后,富铁相的形态未发生明显变化,但长度大幅减小,说明RE对富铁相的长大具有显著的抑制作用。当采用Sr变质时,合金的综合力学性能达到最佳,其中伸长率较添加Al-5Ti-1B、La、Ce时的分别提高56.8%、32.7%和21.1%。 | 李文树 宋东福 周海涛 曾强 楼华山 王顺成 | 2020 | 中国有色金属学报2020，30，7： | 6 |
| 2 | Kinetics and numerical simulation of self-propagating high-temperature synthesis in Ti–Cr–Al–C systems显示文摘In this paper, Ti–Cr–Al–C materials were investigated by self-propagating high-temperature synthesis(SHS) according to the experimental study and numerical simulation results. The highest adiabatic combustion temperature Tadof 2,467.45 K indicates that the2Ti–0Cr–Al–C is the highest exothermic reaction system in the Ti–Cr–Al–C system. The adiabatic combustion temperature decreases with the increase of the Cr content. And a higher exothermal reaction would result in higher porosity which is induced by the high temperature and pressure of C reducing atmosphere and Al vapor. Combustion characterization of the products shows that the geometrical alternating layers result in the high exothermal reaction and flame-front propagating velocity. The higher the Tadis, the thinner the layer is. To demonstrate the process of the microscopic characterization and show the detailed combustion process closed to the experimental observations, the flame-front propagating velocity and temperature distribution were simulated numerically. | Guo-Bing Ying Xiao-Dong He Shan-Yi Du Yong-Ting Zheng Chun-Cheng Zhu Yu-Ping Wu Cheng Wang | 2014 | Rare Metals2014，33，5： | 5 |
| 3 | 锶变质时间对近共晶铝合金电力金具材料组织与性能的影响显示文摘在近共晶成分Al-Si-Mg合金中,加人锶(Sr)作为变质剂,研究变质时间对合金组织与性能的影响。结果表明,Sr能使共晶硅在铸态时呈团絮状,热处理后颗粒状的组织更细小。但是,随变质时间的延长,镁(Mg)、Sr含量会逐渐烧损,导致强化效果与变质效果削减,力学性能也随之降低,当变质时间为1h时,合金的综合力学性能最好,此时,其抗拉强度为325.6MPa,伸长率为8.3%。 | 李捷 张军 | 2020 | 铸造技术2020，41，10： | 4 |
| 4 | Formation of M_(n+1)AX_n phases in Ti–Cr–Al–C systems by self-propagating high-temperature synthesis显示文摘In this paper, phase composition of the Mn+1-AXnphases by self-propagating high-temperature synthesis(SHS) was determined using Ti, Cr, Al, and carbon black as raw materials. And, phase composition and microstructures of the Mn+1AXnphases-contained bulk by SHS with the pseudo-hot isostatic pressing(SHS/PHIP) were investigated in Ti–Cr–Al–C systems raw materials. Rietveld XRD refinement was introduced to study the lattice parameters and phase composition of the resultant phases from the SHSed and SHS/PHIPed samples. Ti2 AlCx,Ti3AlC2x, and Cr2 AlCxby SHS were detected in the Ti–Cr–Al–C systems, as well as the binary carbide of TiC and intermetallics. The mechanical properties of the synthesized bulk samples were determined, exhibiting a high strength and toughness compared with the typical monolithic Mn+1AXnphase ceramics. It is indicated that the samples prepared by SHS/PHIP are identified to be a strategy for improving the mechanical properties of monolithic Mn+1AXnphase. | Guo-Bing Ying Xiao-Dong He Shan-Yi Du Chun-Cheng Zhu Yong-Ting Zheng Yu-Ping Wu Cheng Wang | 2014 | Rare Metals2014，33，4： | 2 |
| 5 | 铝热还原工艺条件对Al-Ti-Ce中间合金物相结构和合金元素浓度的影响显示文摘在Na_(3)AlF_(6)-NaCl-KCl氟氯混合电解质体系中,通过铝热还原法以TiO_(2)和CeO_(2)为Ti源和Ce源,制备Al-Ti-Ce中间合金。研究反应时间、反应温度、电解质构成(Na_(3)AlF_(6)含量)、K_(2)TiF_(6)添加量4种工艺条件对Al-Ti-Ce中间合金物相结构和合金元素浓度的影响。结果表明,在所有实验工艺参数范围内,制备的Al-Ti-Ce中间合金均由α-Al、Al_(3)Ti和Ti_(2)Al_(20)Ce三相构成。制备的最佳单因素工艺参数为:反应时间90 min,反应温度850℃,Na_(3)AlF_(6)质量分数40%、K_(2)TiF_(6)添加量20mol%。热力学分析结果从理论上进一步证明了在实验条件下几种主要化学反应的可行性。 | 李森 高锋 沈东东 龙文元 李新生 王开拓 王友彬 藤田丰久 韦悦周 | 2022 | 稀有金属材料与工程2022，51，5： | 1 |
| 6 | 新型Al-Ti-La中间合金对亚共晶Al-7Si合金显微组织和力学性能的影响显示文摘制备了一种新型Al-Ti-La中间合金,用来细化变质处理亚共晶Al-7Si合金中的α-Al和共晶Si相。研究了新型Al-Ti-La中间合金对亚共晶Al-7Si合金显微组织和力学性能的影响。结果表明:新型Al-Ti-La中间合金对初生α-Al和共晶Si表现出优异的细化变质效果。加入0.2%Al-Ti-La,可以使α-Al晶粒尺寸从1460μm减小到230μm,减小了84.25%;二次支晶臂间距从28.55μm减小到15.16μm,减小了46.90%;共晶Si的形貌由粗大的针片状转变为细小的短棒状和颗粒状。随着初生α-Al和共晶Si相的细化,Al-7Si合金的抗拉强度从154 MPa增加到175 MPa,增加了13.63%;伸长率从5.83%增加到11.94%,增加了104.80%。断裂方式由穿晶断裂向沿晶断裂转变,合金的塑韧性提高。 | 丁万武 苟璐珉 | 2022 | 有色金属工程2022，12，11： | 1 |
| 7 | 氢化钛-石油焦制备Al-Ti-C-Ce母合金显微组织及其凝固机制研究显示文摘采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)等现代检测分析方法,研究了由TiH2-石油焦-铝铈合金与铝液制备的不同Ce含量的Al-Ti-C-Ce母合金的显微组织,结果表明:Al-Ti-C-Ce母合金由α(Al),(TiC),(TiAl3),(Ti2Al20Ce)相组成;Al-Ti-C-Ce母合金铸样晶界为连续的共晶组织,晶内分布着大量的粗大第二相组织,晶界共晶和晶内第二相中均含有Ti2Al20Ce相。部分大颗粒第二相组织为复合结构,复合晶粒内部存在颜色较深的α(Al)+Ti2Al20Ce+(TiC)的包晶组织。线分析结果表明:第二相粒子中,元素C的分布相对均匀,粒子内部C, Al含量相对较低, Ti, Ce含量相对较高, Ce的分布显著高于粒子外部区域;具有复合结构的第二相中所包含的粒子区域, Ti, C含量极高,而Al, Ce含量较低。合金在凝固过程中, TiC粒子作为晶核优先析出, TiAl3相通过TiC粒子形核,并与游离的Ti, Ce发生包晶反应生成Ti2Al20Ce相,多余Ce原子会与晶界处的TiC, TiAl3的复合粒子反应生成TiC, Ti2Al20Ce复合粒子。含Ti, C, Ce的复合粒子作为领先相优先析出,细化Al-Ti-C-Ce母合金晶粒。 | 贺永东 杨啸雨 郭锋 李鹏 张媛庆 豆银丽 | 2019 | 稀有金属2019，43，7： | 1 |
| 8 | Al_(2.5)Cu_(0.5)Ti中间合金对Al-7Si合金微观组织和力学性能的影响显示文摘通过真空电弧熔炼炉制备Al_(2.5)Cu_(0.5)Ti中间合金,利用光学显微镜(OM)、扫描电子显微镜(SEM)、电子探针显微分析仪(EPMA)、X射线衍射仪(XRD)、差热分析仪(DSC)和万能材料试验机,研究不同添加量(0.3%,0.5%,0.7%,0.9%和1.3%,质量分数,下同)Al_(2.5)Cu_(0.5)Ti中间合金对Al-7Si合金微观组织和性能的影响。结果表明:随着Al_(2.5)Cu_(0.5)Ti合金添加量的增加,Al-7Si合金中初生α-Al和共晶Si组织被显著细化。与未添加Al_(2.5)Cu_(0.5)Ti中间合金相比,当Al-7Si合金中添加0.9%Al_(2.5)Cu_(0.5)Ti中间合金后,初生α-Al晶粒尺寸从218μm减小到80μm,二次枝晶间距从25μm减小到9.3μm;共晶Si组织由粗大的针片状细化为短片状和短棒状,平均长度和宽度分别从34.8μm和4μm减小到11.6μm和1.7μm;合金的抗拉强度和伸长率分别达到184 MPa和9.3%,与未变质合金的力学性能(162 MPa和3%)相比分别提高了13.6%和210%,断裂模式由韧脆混合断裂模式转变为韧性断裂。然而,当Al_(2.5)Cu_(0.5)Ti合金的添加量增加到1.3%时,发生过变质现象,导致Al-7Si合金组织粗化,力学性能下降。 | 王平波 孙赫阳 张岩 张杰 李庆林 | 2023 | 材料工程2023，51，12： | 0 |
| 9 | Mechanical properties of Ti_(3)AlC_(2)ceramics before and after heat treatment显示文摘Ti_(3)AIC_(2)ceramics were heat treated at the temperature from 1050 to 1450℃.Vickers hardness,fracture toughness,flexural strength and compressive strength of Ti_(3)AlC_(2)were tested and calculated before and after heat treatment,respectively.Ti_(3)AIC_(2)content,fracture toughness,flexural strength and compressive strength of Ti_(3)AIC_(2)first increase and then decrease,while Vickers hardness is just the opposite with the increase in temperature from 1050 to 1450℃C.After heat treatment at1250℃,Ti_(3)AIC_(2)content reaches the highest level of94.2 wt%,and fracture toughness,flexural strength and compressive strength reach the maximum values,which are6.4 MPa·m^(1/2),318 MPa and 662 MPa,respectively.Vickers hardness reduces to the lowest value of 2.9 GPa.Heat treatment does improve the strength and Ti_(3)AlC_(2)content,but reduces the hardness and optimizes the mechanical properties of Ti_(3)AlC_(2). | Lei Yao Chun-Cheng Zhu Jiu-Xing Jiang Bai-Bin Zhou | 2022 | Rare Metals2022，41，8： | 0 |
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