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高温下发生反应,生成TiC等产物,同时,钛合金熔液冲刷导流管内壁,将碳元素带入钛合金液流中,这两种因素均引起了雾化粉末的碳含量增加,降低球形TC4粉末的品质.然而,在导流管内壁的Y2O3涂层在高温下能有效地阻止钛合金液流与石墨发生的碳化反应,从而大幅降低最终TC4粉末的碳含量. 表2 原始材料及雾化TC4粉末的间隙元素含量 Table 2 Interstitial......
致炉渣tm增大. 实际的高炉冶炼钒钛磁铁矿过程中,渣中TiO2不仅会与CaO生成钙钛矿高熔点物质,而且还会被高炉内强还原性气氛还原,形成TiC,TiN及Ti(C,N)熔点更高的物质[10],导致tm增大.有关研究报道[11]:低钛渣tm处于1 250.0~1 350.0 ℃范围内,中钛渣tm处于1 310.0~1 430.0 ℃范围内,而高钛渣tm处于1 380.0~ 1 450.0......
the application of Fe-based alloy in laser cladding. ZHANG et al [7] obtained in situ TiC-VC reinforced Fe-based cladding layer on low carbon steel surface by laser cladding of Fe-Ti-V-Cr-C-CeO2 alloy powders...: Thermal stress analysis [J]. Opt Lasers Eng, 2010, 48: 740-749. [4] WANG F, MEI J, WU X H. Compositionally graded Ti6Al4V+ TiC made by direct laser fabrication using powder and wire [J]. Mater Des, 2007......
-spark deposition)技术是一种低应力,低变形的表面微焊接技术,它的基本原理就是把电极材料(硬质合金如WC,TiC等)作为工作电极(阳极),氩气中使之与被沉积的金属工件(阴极)之间产生火花放电,在10-5~10-6 s内电极与工件接触的部位达到8000~25000 ℃的高温,直接利用火花放电的能量,将电极材料转移至工作表面,构成沉积层的沉积方法[1-3].电火花沉积后工件心部的组织和力学性能不发生变化,工件不会退火或热变形.利用这一技术制造WC-Co硬质合金沉积层可以大大提高基体材料表面的硬度和耐磨性.关于电火花沉积WC-Co硬质合金的报道国内较多,如在铸钢,铸铁,不锈钢,H13钢,钛合金等材料上研究了电火花沉积WC-Co合金后涂层的厚度,组织结构,物相分析,成分分析,涂层的硬度和室温耐磨性等内容[4-8].国外研究人员研究了在合金钢,球墨铸铁,钛合金,TiC-Ni基合金等材料上......
, B4C, Al2O3, AlN, Si3N4, TiC, TiO2, TiB2 and graphite have been reinforced into it. On the other hand, nano-crystalline matrices strengthened by nano-sized reinforcement are expected to have much better......
has better corrosion resistance in dilute HNO3 and aqua regia, while the decomposition product TiC dissolves into the solutions. This is coincident with the EDS patterns, in which C and Ti contents have... and characterization of the ternary phase Ti3SiC2 [J]. Journal of Materials Science, 1994, 29: 3384-3392. [11] YANG S, SUN Z M, HASHIMOTO H. Reaction in Ti3SiC2 powder synthesis from a Ti-Si-TiC powder mixture......
melting processed Ni-Al-TiC composites [J]. Materials Characterization, 2012, 69: 97-107. [10] GUIGNARD A, MAUER G, R, STOVER D. Deposition and characteristics of submicrometer-structured thermal barrier... Science, 2005, 240: 42-47. [18] LUO P, DONG S, XIE Z, YANG L A, YANG W. The effects of coating parameters on the quality of TiB2–TiC composite phase coating on the surface of Cu-Cr-Zr alloy electrode......
[J]. Applied Surface Science, 2016, 363: 50-58. [14] XIE Le-chun, JIANG Chuan-hai, LU Wei-jie, ZHAN Ke, CHEN Yan-hua. Investigation on the residual stress and microstructure of (TiB+TiC)/Ti-6Al-4V......
成Al2Cu4化合物,显著增强界面连接强度,致密度提高到98.35%,提高复合材料导热和力学性能. 3) 铜-金刚石/铝与金刚石/铝相比,热导率提升近10%,达到Maxwell模型预测值的76%.镀层对于复合材料热膨胀系数影响不大,热膨胀系数基本与Kerner模型预测值相同. REFERENCES [1] 王新宇, 于家康, 朱晓敏. 镀TiC金刚石/铝复合材料的界面及热膨胀性能[J]. 中国有色金属学报, 2012, 22(6): 1718-1724. WANG Xin-yu, YU Jia-kang, ZHU Xiao-min. Interface and thermal expansion properties of TiC-coated diamond/Al composites[J]. The Chinese Journal of Nonferrous Metals, 2012......
S. Nanomechanical properties of TiC, TiN and TiCN thin films using scanning probe microscopy and nanoindentation[J]. Applied Surface Science, 2004, 228(1): 365-372. [4] CHEN S H, LIU L, WANG T......
