TiC含量对Mo-10W-TiC合金组织与性能的影响

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Abstract Mo-10W-TiC alloys (mass fraction of TiC are 0.5%~6%) were prepared by powder metallurgy method through adding TiC into Mo-W matrix. The effects of TiC content on microstructure and tensile property of Mo-10W-TiC composites were studied. The results show that TiC particles in the green body interdiffuse with the matrix during of sintering, (Mo,Ti)_xC_y and a small amount of (W,Ti)_xC_y solid solution are formed in the particles, and forming the second phase particles with unsoluted TiC. At the same time, TiC particles can effectively inhibit the grain growth during sintering, and the grain size decreases with increasing the TiC content. The relative density and tensile strength increase firstly and decrease lately with increasing the TiC content sintered at 1 920 ℃. When the TiC content is 4%, Mo-10W-4TiC alloy exhibits the highest relative density of 99.7% and tensile strength of 497 MPa. The addition of excess TiC leads to the bonding strength between the TiC particles and the matrix decreasing. Tensile fracture morphology of the alloy shows that with the increase of TiC content, the fracture mode of the alloy transforms from simple intergranular fracture into mixed mode of intergranular fracture and transgranular fracture.

Key words： powder metallurgy molybdenum alloy second phase particle diffusion behavior tensile strength

Received: 03 January 2018 Published: 12 July 2019

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TG146.4⁺12

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	XIONG Gang
	CHENG Huichao
	FAN Jinglian
	YAO Songsong
	LI Xing

Cite this article:

XIONG Gang,CHENG Huichao,FAN Jinglian, et al. Effects of TiC content on property and microstructure of Mo-10W-TiC alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 454-459.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I5/454

[1] 成会朝, 范景莲, 刘涛, 等. TZM钼合金制备技术及研究进展[J]. 中国钼业, 2008, 32(6): 40-45.
CHENG Huichao, FAN Jinglian, LIU Tao, et al.Preparation and research development of TZM molybdenum alloys[J]. China Molybdenum Industry, 2008, 32(6): 40-45.
[2] 范景莲, 成会朝, 卢明园, 等. 微量合金元素Ti、Zr对Mo合金性能和显微组织的影响[J]. 稀有金属材料与工程, 2008, 27(8): 1471-1474.
FAN Jinglian, CHENG Huichao, LU Mingyuan, et al.Effect of microscale alloying element Ti and Zr on performance and microstructure of Mo alloys[J]. Rare Materials and Engineering, 2008, 27(8): 1471-1474.
[3] MROTZEK T, HOFFMANN A, MARTIN U.Hardening mechanisms and recrystallization behavior of several molybdenum alloys[J]. International Journal of Refractory Metals and Hard Materials, 2006, 24(4): 298-305.
[4] COCKERAM B V.The fracture toughness and toughening mechanism of commercially available unalloyed molybdenum and oxide dispersion strengthened molybdenum with an equiaxed, large grain structure[J]. Metallurgical and Materials Transactions A, 2009, 40(12): 2843-2860.
[5] STURM D, HEILMAIER M, SCHNEIBEL J H, et al.The influence of silicon on the strength and fracture toughness of molybdenum[J]. Materials Science and Engineering A, 2007, 463(1/2): 107-114.
[6] WANG T, GUO M, CAO L, et al.The annealing characteristics of pure molybdenum bars manufactured by a modified technique[J]. Journal of Alloys and Compounds, 2008, 462(1): 386-391.
[7] 杨晓青, 贺跃辉, 罗振中, 等. 掺杂La对钼丝组织和性能的影响[J]. 中国材料进展, 2006, 25(3): 30-33.
YANG Xiaoqing, HE Yuehui, LUO Zhenzhong, et al.Effect of doping La on Structure and peformence of molybdenum wire[J]. Materials China, 2006, 25(3): 30-33.
[8] 钱昭, 范景莲, 成会朝, 等. 微量TiC对Mo-Ti-Zr-TiC合金性能与显微组织的影响[J]. 稀有金属材料与工程, 2012, 41(6): 1107-1110.
QIAN Zhao, FAN Jinglian, CHENG Huichao, et al, Effect of trace TiC on property and microstructure of Mo-Ti-Zr-TiC alloy[J]. Rare Metal Materials and Engineering, 2012, 41(6): 1107-1110.
[9] BUKHANOVSKII V V.Features of the deformation and failure of molybdenum-tungsten alloy with high temperature repeated static loading[J]. Powder Metallurgy and Metal Ceramics, 2003, 42(5/6): 302-309.
[10] PAUL B, JAIN D, CHAKRABORTY S P, et al.Sintering kinetics study of mechanically alloyed nanocrystalline Mo-30wt.%W[J]. Thermochimica Acta, 2011, 512(1): 134-141.
[11] OHSER W R, MARTIN U, MÜLLER A, et al. Spark plasma sintering of Mo-W powders prepared by mechanical alloying[J]. Journal of Alloys and Compounds, 2013, 560(3): 27-32.
[12] OHSER W R, WECK C, MARTIN U, et al.Spark plasma sintering of TiC particle-reinforced molybdenum composites[J]. International Journal of Refractory Metals and Hard Materials, 2012, 32(5): 1-6.
[13] TAKIDA T, KURISHITA H, MABUCHI M, et al.Mechanical properties of fine-grained, sintered molybdenum alloys with dispersed particles developed by mechanical alloying[J]. Materials Transactions Jim, 2004, 45(1): 143-148.
[14] CEDAT D, REY C, CLAVEL M, et al.Microstructural characterization of a composite Mo reinforced by 25at.%TiC[J]. Journal of Nuclear Materials, 2009, 385(3): 533-537.
[15] SONG G M, WANG Y J, ZHOU Y.Thermomechanical properties of TiC particle-reinforced tungsten composites for high temperature applications[J]. International Journal of Refractory Metals and Hard Materials, 2003, 21(1/2): 1-12
[16] YOO M K, HIRAOKA Y, KURISHITA H, et al.Recrystallization of TiC dispersion Mo-alloy[J]. International Journal of Refractory Metals and Hard Materials, 1996, 14(5): 355-364.
[17] GENÇ A, COŞKUN S, ÖVEÇOĞLU M L. Decarburization of TiC in Ni activated sintered W-xTiC(x=0, 5, 10,15wt%) composites and the effects of heat treatment on the microstructural and physical properties[J]. International Journal of Refractory Metals and Hard Materials, 2010, 28(3): 451-458.
[18] LIU G, ZHANG G J, JIANG F, et al.Nanostructured high-strength molybdenum alloys with unprecedented tensile ductility[J]. Nature Materials, 2013, 12(4): 344.
[19] BROWNING N P, FIGNAR J, KULKRNI A, et al.Sintering behavior and mechanical properties of Mo-TZM alloyed with nanotitanium carbide[J]. International Journal of Refractory Metals and Hard Materials, 2017, 62: 78-84.