制备方法对陶瓷结合剂结构与性能的影响
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摘要
采用干混法、熔融法、溶胶凝胶法分别制备了同种配方的陶瓷结合剂,通过对其显微形貌以及耐火度、流动性、物相组成、抗弯强度、气孔率等性能进行表征,研究不同制备方法对陶瓷结合剂结构与性能的影响。结果表明:采用熔融法制备的陶瓷结合剂具有抗弯强度高和热膨胀系数较低的优点;采用溶胶凝胶法制备的陶瓷结合剂则具有耐火度低、流动性好和组织均匀的优点。三种不同方法制备的陶瓷结合剂的抗弯强度、气孔率、硬度和热膨胀系数分别为32.68MPa、26.42%、60.7HRB、9.72×10~(-6)/℃;68.52MPa、0.55%、88.3HRB、5.81×10~(-6)/℃;46.31MPa、28.74%、64.3HRB、7.34×10~(-6)/℃。
Vitrified bonds with the same formula are prepared by dry mixing,melting and sol-gel methods respectively.The effects of different methods on the microstructure and properties of the vitrified bond are studied through characterizing the microstructure,refractoriness,fluidity,phase constitution,bend strength and porosity.The results show that the vitrified bond prepared by melting method has the advantages of high bending strength and low thermal expansion coefficient and the vitrified bond prepared by sol-gel method has such excellent properties as low refractoriness,good fluidity and uniform structure.The bending strength,porosity,rockwell hardness and thermal expansion coefficient of vitrified bonds by three different methods are 32.68 MPa,26.42%,60.7 HRB,9.72×10~(-6)/℃;68.52 MPa,0.55%,88.3 HRB,5.81×10~(-6)/℃;46.31 MPa,28.74%,64.3 HRB,7.34×10~(-6)/℃ respectively.
Vitrified bonds with the same formula are prepared by dry mixing,melting and sol-gel methods respectively.The effects of different methods on the microstructure and properties of the vitrified bond are studied through characterizing the microstructure,refractoriness,fluidity,phase constitution,bend strength and porosity.The results show that the vitrified bond prepared by melting method has the advantages of high bending strength and low thermal expansion coefficient and the vitrified bond prepared by sol-gel method has such excellent properties as low refractoriness,good fluidity and uniform structure.The bending strength,porosity,rockwell hardness and thermal expansion coefficient of vitrified bonds by three different methods are 32.68 MPa,26.42%,60.7 HRB,9.72×10~(-6)/℃;68.52 MPa,0.55%,88.3 HRB,5.81×10~(-6)/℃;46.31 MPa,28.74%,64.3 HRB,7.34×10~(-6)/℃ respectively.
引文
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[2]Song D D,Wan L,Liu X P,et al.Effect of hot pressing temperature on microstructure,mechanical properties and grinding performance of vitrified-metal bond diamond wheels[J].International Journal of Refractory Metals and Hard Materials,2016,54:289-294.
[3]周琪,何峰,谢峻林,等.低温高强SiO2-B2O3-Al2O3-CaO-Na2O陶瓷结合剂的结构与性能研究[J].武汉理工大学学报,2014,36(9):7-11.
[4]侯永改.陶瓷磨具制造[M].北京:中国轻工业出版社,2010.
[5]黄剑锋.溶胶凝胶原理与技术[M].北京:化学工业出版社,2005.
[6]Santiago A,Gonzalez A,Iruin J,et al.Preparation of superhydrophobic silica nanoparticles by microware assisted sol-gel process[J].Journal of Sol-gel Science and Technology,2012,61(1):8-13.
[7]Minami T.Advanced sol-gel coatings for practical applications[J].Journal of Sol-gel Science and Technology,2013,65(1):4-11.
[8]Wang X F,Wang R C,Peng C Q,et al.Polyacrylamide gel method:synthesis and property of BeO nanopowders[J].Journal of Sol-Gel Science and Technology,2011,57(2):115-127.
[9]Luo J T,Zhang C X,Gu Y F.Preparation of Y2O3 nano-phased powders by polyacrylamide gel method[J].Advanced Materials Research,2010,92:189-193.
[10]张贝贝.高分子网络凝胶法制备超细陶瓷结合剂及其表征[D].秦皇岛:燕山大学,2010.
[11]陈敢新,吕智,章兼植,等.CBN砂轮陶瓷结合剂的研究进展[J].金刚石与磨料磨具工程,2003(5):35-39.
[12]胡伟达.溶胶凝胶法制备陶瓷结合剂金刚石砂轮的研究[D].长沙:湖南大学,2013.
[13]常青,茹红强,喻亮,等.羟基磷灰石粉体的低温无压烧结行为[J].人工晶体学报,2009,38(1):366-370.
[14]王蕾,张贝贝,王丽萍,等.调制技术对多组分陶瓷结合剂结构和性能的影响[J].金刚石与磨料磨具工程,2013,33(6):7-11.
[15]Xia Y F,Zeng Y P,Jiang D L.Mechanical and dielectric properties of porous Si3N4 ceramics using PMMA as pore former[J].Ceramics International,2011,37:3775-3779.
[16]Lv X F,Li Z H,Zhu Y M,et al.Effect of PMMA pore former on microstructure and mechanical properties of vitrified bond CBN grinding wheels[J].Ceramics International,2013,39(2):1893-1899.
[17]R B Nuernberg,C A Faller,O R K Montedo.Crystallization kinetic and thermal and electrical properties of β-spodumeness/cordierite glass-ceramics[J].Journal of Thermal Analysis and Calorimetry,2017,127(1):355-362.