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冲击波合成立方氮化硅
作者:姚怀 徐巧玉 唐敬友 唐翠霞  
单位:河南科技大学材料科学与工程学院 河南科技大学机电工程学院 西南科技大学材料科学与工程学院 西南科技大学材料科学与工程学院 河南洛阳471003 河南洛阳471003 四川绵阳621010 四川绵阳621010 
关键词:冲击压缩  平面飞片装置  立方氮化硅  合成 
分类号:TQ174.1
出版年,卷(期):页码:2008,36(1):6-10
DOI:
摘要:

以α-Si3N4粉体作原材料,采用平面飞片加载装置和样品回收装置进行了冲击波压缩合成实验,完整地回收到c-Si3N4,其单次合成出的c-Si3N4达到克量级。在40GPa,3600K或在65GPa,6200K的条件下,都有c-Si3N4生成;在45~55GPa,4000~4500K的条件下,c-Si3N4的转化率比较高,最高可达80%。在冲击波合成c-Si3N4的过程中,伴随着生成一定量的β-Si3N4。合成出的c-Si3N4粉体团聚体的颗粒尺寸约为1μm。

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An apparatus including a planar metal disc flyer and a cylindrical chamber driven by explosives was designed to shock-wave synthesize cubic silicon nitride using α-Si3N4 powders as starting materials. About 1 g c-Si3N4 can be obtained in each test using the apparatus. When the pressure was up to 40 GPa (or 65 GPa) and the temperature was 3 600 K (or 6 200 K), c-Si3N4 can be synthesized. The ratio of transformation from α-Si3N4 to c-Si3N4 approached 80% at pressures from 45 GPa to 55 GPa and temperatures from 4 000 K to 4 500 K. In the synthesized products, a small amount of β-Si3N4 was observed. The c-Si3N4 powders obtained were conglomerated to particles of about 1 μm in size.

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基金项目:
国家自然科学基金(50472102);; 西南科技大学引进人才基金(ZK043030)资助项目。
作者简介:
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参考文献:

[1]LIU A Y,COHEN M L.Prediction of new low compressibility solids[J].Science,1989,245:841–842. [2]TETER D M,HEMLEY R J.Low-compressibillity car bon nitrides[J].Science,1996,271:53–55. [3]MESSIER D R,CROFT W J.Preparation and Properies of Solid State Material[M].New York:Marcel Dekker,Inc.,1982:p.131. [4]ZERR A,MLIEHE M,SERGHIOU G,et al.Synthesis of cubic silicon nitride[J].Nature,1999,400:340–342. [5]MO S,OUYANG L,CHING W Y,Interesting physical properties of the new spinel phase of Si3N4and C3N4[J].Phys Rev Lett,1999,83(24):5046–5049. [6]SEKINE T,HE H,KOBAYASHI T,et al.Shock-induced transformation ofβ-Si3N4to a high-pressure cubic-spinel phase[J].Appl Phys Lett,2000,76(25):3706–3708. [7]JIANG J Z,STAHL K,BERG R W,et al.Structural characterization of cubic silicon nitride[J].Eur Phys Lett,2001,51(1):62–67. [8]SCHARZ M,MIEHE G,ZEER A,et al.Spinel-Si3N4:multi-anvil press synthesis and structural refinement[J].Adv Mater,2000,12:833–887. [9]YUNOSHEV A S,Shock-wave synthesis of cubic silicon nitride[J].Combs Explos Shock Waves,2004,40(3):370–373. [10]SEKINE T,MITSUHASHI T.High-temperature metastability of cubic spinel Si3N4[J].Appl Phys Lett,2001,79(17):2719–2721. [11]JIANG J Z,KRAGH F,FROST D J,et al.Hardness and thermal stability of cubic silicon nitride[J].J Phys:Condens Mater,2001,13:L515–L520. [12]TANAKA I,MIZOGUCHI T,SEKINE T,et al.Electron energy loss near-edge strctures of cubic Si3N4[J].Appl Phys Lett,2001,78(15):2134–2136. [13]经福谦.实验物态方程导引[M].第2版.北京:科学出版社,1999:81–99.JING Fuqian,Introduction on Experimental Equation of State(in Chinese).2nd ed.Beijing:Science Press,1999:81–99. [14]GENG H,WU Q,TAN H,et al.Bulk sound velocity of porous materials at high pressres[J].Chin Phys Lett,2002,11(11):1188–1192. [15]何崇智,郗秀容,孟庆恩,等.X射线衍射实验技术[M].第1版.上海:科学技术出版社,1988:152–154.HE C Z,XI X R,MENG Q E,et al.Experiment Technology of X-ray Diffraction(in Chinese).1st ed.Shanghai:Science and Technology Press,1988:152–154.

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