成形压力对SiC/TiB2复合材料组织与性能的影响

doi:10.15541/jim20160429

摘要/Abstract

摘要：

基于熔融Si浸渗法制备出较致密的SiC/TiB₂复合材料, 并研究了坯体成形压力对SiC/TiB₂复合材料致密度、相组成、显微组织和力学性能的影响。实验结果表明, 复合材料由TiB₂、SiC和Si相组成。SiC/TiB₂复合材料的显微组织特征为: TiB₂相和SiC相均匀分布, 游离Si填充在TiB₂相和SiC相的空隙处, 且形成了连续相。随成形压力的增大, 复合材料中游离Si含量降低, TiB₂颗粒尺寸减小, 复合材料的力学性能先增加后降低。坯体最佳成形压力为200 MPa, 对应SiC/TiB₂复合材料的体积密度、开口气孔率、抗弯强度、断裂韧性和维氏硬度分别为3.63 g/cm³、0.90%、(354±16) MPa、(6.8±0.2) MPa·m^1/2和(21.0±1.1) GPa。

关键词: SiC/TiB2复合材料, 渗Si, 成形压力, 显微组织, 力学性能

Abstract:

SiC/TiB₂ composites were fabricated by infiltration of molten silicon (Si) into porous preforms containing titanium diboride (TiB₂) and free carbon (C) at 1550℃ for 30 min. And the influences of forming pressure on the phase compositions, microstructure, density and mechanical properties of SiC/TiB₂ composites were investgated. It is found that forming pressures have significant influence on the microstructure and mechanical properties of SiC/TiB₂ composites. XRD results show that the composites consist of TiB₂, SiC and Si phases. The microstructure analysis show that the TiB₂ and SiC phases distribute in the composite uniformly, with free Si fills in the continuous gaps between TiB₂ and SiC phases. TiB₂ particle size and volume fraction of free Si both decrease with the increase of forming pressures. The mechanical properties of SiC/TiB₂ composites are improved initially and then deteriorated with the increase of forming pressures. Under the optimal pressure of 200 MPa, Vikers-hardness, flexural strength and fracture toughness of the obtained SiC/TiB₂ composite are (21.0±1.1) GPa, (354±16) MPa and (6.8±0.2) MPa·m^1/2, respectively. The open porosity and bulk density of the obtained SiC/TiB₂ composite prepared at 200 MPa forming pressure are 0.90% and 3.63 g/cm³.

Key words: SiC/TiB2 composite, Si infiltration, forming pressure, microstructures, mechanical properties

中图分类号:

TB332

张翠萍, 高向伟, 茹红强, 孙卫康, 朱景辉, 宗辉. 成形压力对SiC/TiB₂复合材料组织与性能的影响[J]. 无机材料学报, 2017, 32(5): 502-508.

ZHANG Cui-Ping, GAO Xiang-Wei, RU Hong-Qiang, SUN Wei-Kang, ZHU Jing-Hui, ZONG Hui. Effect of Forming Pressure on Microstructure and Mechanical Properties of SiC/TiB₂ Composites[J]. Journal of Inorganic Materials, 2017, 32(5): 502-508.

图/表 7

图1 成形压力对坯体气孔率和体积密度的影响

Fig. 1 Effect of forming pressures on the porosity and volume density of green bodies

图2 不同成形压力下制备的SiC/TiB2复合材料的XRD图谱

Fig. 2 XRD patterns of SiC/TiB2 composites prepared at different forming pressures (a) 50 MPa; (b) 100 MPa; (c) 150 MPa; (d) 200 MPa; (e) 250 MPa

图3 不同成形压力下制备的SiC/TiB2复合材料的SEM背散射照片

Fig. 3 Backscattered SEM micrographs of SiC/TiB2 composites prepared at various forming pressures (a) 50 MPa; (b) 100 MPa; (c) 150 MPa; (d) 200 MPa; (e) 250 MPa

图4 成形压力对SiC/TiB2复合材料中TiB2晶粒平均尺寸的影响

Fig. 4 Effect of forming pressures on the average sizes of TiB2 grains in SiC/TiB2 composites

表1 SiC/TiB2复合材料成分及密度

Table 1 Compositions and densities of SiC/TiB2 composites

Number	Forming pressures/ MPa	Compositions and densities of SiC/TiB₂ composites
Number	Forming pressures/ MPa	\(\rho_{TiB_2}/\%\)	v_SiC/ %	v_Si/ %	\(w_{TiB_2}/\%\)	w_SiC/ %	w_Si/ %	ρ_t/ (g·cm^-3)	ρ_v/ g·cm^-3	ρ_r/ %	ε/ %
1#	50	46.83	19.11	34.06	60.07	17.41	22.52	3.52	3.45	98.01	0.48
2#	100	50.81	20.74	28.45	63.35	18.36	18.29	3.62	3.54	97.79	0.69
3#	150	53.33	21.77	24.90	65.34	18.94	15.72	3.69	3.56	96.48	0.62
4#	200	54.19	22.12	23.69	66.00	19.13	14.87	3.71	3.63	97.84	0.89
5#	250	54.31	22.17	23.52	66.09	19.15	14.76	3.71	3.61	97.30	0.71

图5 成形压力对SiC/TiB2复合材料力学性能的影响

Fig. 5 Effect of forming pressures on the mechanical properties of SiC/TiB2 composites

图6 不同成形压力下SiC/TiB2复合材料断口形貌的SEM照片

Fig. 6 SEM micrographs of fracture surfaces of SiC/TiB2 composites prepared at various forming pressures 50 Mpa; (a) Secondary electron micrograph; (b) Backscattered electron micrograph. 250 Mpa; (c) Secondary electron micrograph; (d) Backscattered electron micrograph

参考文献 30

[1]	MUNRO R G.Material properties of titanium diboride.J. Res. Natl. Inst. Stan., 2000, 105(5): 709-720.
[2]	MURTHY T S R CH, SONBER J K, VISHWANADH B, et al. Densification, characterization and oxidation studies of novel TiB2+EuB6 compounds.J. Alloys Compd., 2016, 670(4): 85-95.
[3]	LUO X T, XIE X L, YUAN R Z.Microstructure and mechanical properties of hot-pressed TiB2 ceramics.J. Inorg. Mater., 2000, 15(3): 541-545.
[4]	NAMINI A S, GOGANI S N S, ASL M S, et al. Microstructural development and mechanical properties of hot pressed SiC reinforced TiB2 based composite.Int. J. Refract. Met. H., 2015, 51: 169-179.
[5]	ZHAO G L, HUANG C Z, LIU H L, et al.Microstructure and mechanical properties of hot pressed TiB2-SiC composite ceramic tool materials at room and elevated temperatures.Mat. Sci. Eng. A-Struct., 2014, 606: 108-116.
[6]	CHEN H B, WANG Z, WU Z J.Investigation and characterization of densification, processing and mechanical properties of TiB2-SiC ceramics.Mater. Design, 2014, 64(9): 9-14.
[7]	LIN J, YANG Y H, ZHANG H A, et al.Microstructure and mechanical properties of TiB2 ceramics enhanced by SiC particles and carbon nanotubes.Ceram. Int., 2016, 42(3): 4627-4631.
[8]	WEN G, LI S B, ZHANG B S, et al.Reaction synthesis of TiB2-TiC composites with enhanced toughness.Acta Mater., 2001, 49(8): 1463-1470.
[9]	WANG H, WANG W M, GU P, et al.Mechanical properties and structure of TiB2-NbB2 composite prepared by hot pressing.J. Inorg. Mater., 2002, 17(3): 703-707.
[10]	WYZGA P, JAWORSKA L, BUCKO M M, et al.TiB2-TiN composites prepared by various sintering techniques.Int. J. Refract. Met. H., 2013, 41(3): 571-576.
[11]	TIAN W B, KITA H, HYUGA H, et al.Synthesis, microstructure and mechanical properties of reaction-infiltrated TiB2-SiC-Si composites.J. Alloy. Compd., 2011, 5(9): 1819-1823.
[12]	ZHANG C P, RU H Q, HE R P, et al.Preparation and properties of TiB2-SiC-Si composites fabricated by reaction bonding.Key Eng. Mater., 2016, 697: 539-546.
[13]	VOYTOVYCH R, BOUGIOURI V, CALDERON N R, et al.Reactive infiltration of porous graphite by NiSi alloys.Acta Mater., 2008, 56(10): 2237-2246.
[14]	WANG Y X, TAN S H, JIANG D L.The effect of porous carbon preform and the infiltration process on the properties of reaction-formed SiC.Carbon, 2004, 42(8-9): 1833-1839.
[15]	黄培云. 粉末冶金原理, 2版. 北京: 冶金工业出版社, 1997, 173-195.
[16]	HUMPHREYS F J.Quantitative metallography by electron backscattered diffraction.J. Microsc-oxford, 1999, 195(3): 170-185.
[17]	YURKOV A L, STARCHENKO A M, SKIDAN B S.Reaction sintering of boron carbide.Refract. Ind. Ceram., 1989, 30(11/12): 731-736.
[18]	MOON H, KIM B, KANG S J L. Growth mechanism of round-edged NbC grains in Co liquid.Acta Mater., 2001, 49(7): 1293-1299.
[19]	MALLICK D, KAYAL T K, GHOSH J, et al.Development of multi-phase B-Si-C ceramic composite by reaction sintering.Ceram. Int., 2009, 35(4): 1667-1669.
[20]	赵祖德. 复合材料固-液成形理论与工艺. 北京: 冶金工业出版社, 2008: 5-6.
[21]	ENGEL U, HUBNER H.Strength improvement of cemented carbides by hot isostatic pressing (HIP).J. Mater. Sci., 1978, 13(9): 2003-2012.
[22]	KRUZIC J J, SATET R L, HOFFMANN M J, et al.The utility of R-curves for understanding fracture toughness-strength.J. Am. Ceram. Soc., 2008, 91(6): 1986-1994.
[23]	SKOROKHOD V, KRSTIC V D.High strength-high toughness B4C-TiB2 composites.J. Mater. Sci. Lett., 2000, 19(3): 237-239.
[24]	CHANTIKUL P, BENNISON S J, LAWN B R.Role of grain size in the strength and R-curve properties of alumina. J. Am. Ceram. Soc., 1990, 73(8): 2419-2427.
[25]	龚江宏. 陶瓷材料断裂力学. 北京: 清华大学出版社, 2001: 138-141.
[26]	CHOI S R, SANDERS W A, SALEM J A, et al.Young’s modulus, strength and fracture toughness as a function of density of in situ toughened silicon nitride with 4wt% scandia.J. Mater. Sci. Lett., 1995, 14(4): 276-278.
[27]	HUTCHINSON J W, SUO Z.Mixed mode cracking in layered materials.Adv. Appl. Mech., 1991, 29(08): 63-191.
[28]	KING D S, FAHRENHOLTZ W G, HILMAS G E.Silicon carbide- titanium diboride ceramic composites.J. Eur. Ceram. Soc., 2013, 33(s15-16): 2943-2951.
[29]	HAYUN S, DILMAN H, DARIEL M P, et al.The effect of aluminum on the microstructure and phase composition of boron carbide infiltrated with silicon.Mater. Chem. Phys., 2009, 118(2): 490-495.
[30]	RICE R W, WU C C, BOICHELT F.Hardness-grain-size relations in ceramics.J. Am. Ceram. Soc., 1994, 77(10): 2539-2553.

成形压力对SiC/TiB₂复合材料组织与性能的影响

Effect of Forming Pressure on Microstructure and Mechanical Properties of SiC/TiB₂ Composites

RichHTML

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

图/表 7

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价

[1]	安文然, 黄晶琪, 卢祥荣, 蒋佳宁, 邓龙辉, 曹学强. 热处理温度对LaMgAl₁₁O₁₉涂层热/力学性能的影响[J]. 无机材料学报, 2022, 37(9): 925-932.
[2]	张叶, 曾宇平. 自蔓延高温合成氮化硅多孔陶瓷的研究进展[J]. 无机材料学报, 2022, 37(8): 853-864.
[3]	夏乾, 孙是昊, 赵义亮, 张翠萍, 茹红强, 王伟, 岳新艳. 碳化硼颗粒级配对硅反应结合碳化硼复合材料结构与性能的影响[J]. 无机材料学报, 2022, 37(6): 636-642.
[4]	洪督, 牛亚然, 李红, 钟鑫, 郑学斌. 等离子喷涂TiC-Graphite复合涂层摩擦磨损性能[J]. 无机材料学报, 2022, 37(6): 643-650.
[5]	徐谱昊, 张相召, 刘桂武, 张明芬, 桂新易, 乔冠军. Al-Ti合金钎焊SiC陶瓷接头界面微观结构与力学性能[J]. 无机材料学报, 2022, 37(6): 683-690.
[6]	丁健翔, 张凯歌, 柳东明, 郑伟, 张培根, 孙正明. Ti₃AlC₂陶瓷及其衍生物Ti₃C₂T_x增强的Ag基电接触材料[J]. 无机材料学报, 2022, 37(5): 567-573.
[7]	蔚海浪, 曹学强, 邓龙辉, 蒋佳宁. LaMeAl₁₁O₁₉/YSZ热障涂层热力学性能和热循环寿命[J]. 无机材料学报, 2022, 37(12): 1259-1266.
[8]	孙扬善, 杨治华, 蔡德龙, 张正义, 柳琪, 房树清, 冯良, 石丽芬, 王友乐, 贾德昌. 粉末烧结法制备α-堇青石基玻璃陶瓷的析晶动力学和性能[J]. 无机材料学报, 2022, 37(12): 1351-1357.
[9]	吴西士, 朱云洲, 黄庆, 黄政仁. 树脂基多孔碳孔结构对C_f/SiC复合材料连接性能的影响[J]. 无机材料学报, 2022, 37(12): 1275-1280.
[10]	孙鲁超, 周翠, 杜铁锋, 吴贞, 雷一明, 李家麟, 苏海军, 王京阳. 光悬浮区熔定向凝固Al₂O₃/Er₃Al₅O₁₂和Al₂O₃/Yb₃Al₅O₁₂共晶陶瓷的制备与性能研究[J]. 无机材料学报, 2021, 36(6): 652-658.
[11]	吕莎莎, 祖宇飞, 陈国清, 赵伯俊, 付雪松, 周文龙. 陶瓷颗粒增强Cr_0.5MoNbWTi难熔高熵合金复合材料的制备及其力学性能[J]. 无机材料学报, 2021, 36(4): 386-392.
[12]	王皓轩, 刘巧沐, 王一光. 高熵过渡金属碳化物陶瓷的研究进展[J]. 无机材料学报, 2021, 36(4): 355-364.
[13]	金敏, 白旭东, 赵素, 张如林, 陈玉奇, 周丽娜. 坩埚下降法生长SnSe单晶及其力学性能研究[J]. 无机材料学报, 2021, 36(3): 313-318.
[14]	李陇彬, 薛玉冬, 胡建宝, 杨金山, 张翔宇, 董绍明. 碳化硅纳米线增韧碳化硅纤维/碳化硅基体损伤行为研究[J]. 无机材料学报, 2021, 36(10): 1111-1117.
[15]	马登浩, 侯振华, 李军平, 孙新, 金恩泽, 尹健. 界面相对3D-SiC/SiC复合材料静态力学性能及内耗特征的影响[J]. 无机材料学报, 2021, 36(1): 55-60.