多孔氧化鋁陶瓷的放電等離子燒結(jié)技術(shù)制備-資料下載頁
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【正文】 is lower than the HP temperature, and the holding time of SPS is shorter than that of HP.在相同的施加的壓力和燒結(jié)溫度，用5分鐘在SPS過程，并在HP工藝60分鐘的保持時(shí)間的樣品進(jìn)行檢通過掃描電子顯微鏡（SEM）。表2顯示，通過SPS制備的多孔氧化鋁陶瓷件展示品增強(qiáng)的致密化中使用HP比較。為了達(dá)到相對(duì)頸部的相似值，對(duì)SPS溫度比HP溫度下，和SPS的保持時(shí)間比HP的短。Table 2 Comparison of the ratios of neck and particle size（χ/R)with sintering temperatures for SPS and HP samples表1 頸部和顆粒大?。é? R）的比值與燒結(jié)溫度對(duì)SPS和HP的樣本比較4 Conclusions4結(jié)論(1) Apparent porosity decreases with increasing sintering temperature and increasing holding time, while the applied pressure has little influence on the porosity because of the high hardness and large dimension of the raw particles. And there exists different optimum heating rate for different systems.（1）隨著燒結(jié)溫度和增加保持時(shí)間的表觀孔隙度減小，而所施加的壓力有因?yàn)楦哂捕群驮项w粒的大尺寸的影響較小的孔隙率。并且存在不同的最佳升溫速率為不同的系統(tǒng)。 (2) The parisons between theoretical and experimental values indicate that the relation between relative neck and porosity described in is proper.（2）的理論值和實(shí)驗(yàn)值之間的比較表明，在中描述的相對(duì)頸部和孔隙率之間的關(guān)系是適當(dāng)?shù)摹?(3) To attain the similar value of relative necks,the SPS temperature should be lower than the HP temperature, and the holding time of SPS should be shorter than that of HP.（3）為了實(shí)現(xiàn)相對(duì)于頸部的相似值，對(duì)SPS溫度應(yīng)比HP溫度下，和SPS的保溫時(shí)間應(yīng)比HP的短。 References參考文獻(xiàn)[1] Eckert K L, Mathey M,Mayer J, et al. Preparation and in vivo testing of porous alumina ceramics for cell carrier applications Biomaterials 2000。 21(1): 6369.[2] Isobe T, Kameshima Y, Nakajima A, et al. Extrusion method using nylon 66 fibers for the preparation of porous alumina ceramics with oriented pores. Journal of the European Ceramic Society 2006。 26(12): 22132217.[3] Tokita M. Trends in advanced SPS spark plasma sintering systems and technology. J Soc Powder Techaol Jpn 1993。 30: 790804.[4] Zhang D M, Fu Z丫Guo J K. Microstructure and temperature distribution in ZnA1204 sintered body妙pulse electric of Materials Science and Technology 2003。 19(6):526528.[5] Wang K,Tan T Y,Fu Z Y,et al. Study on atom di839。rrsion under the treatment by pulse current heating. Materials Science and Engineering: B 2006。 135(2): 154161.[6] Frenkel flow of crystalline bodies under the action of surface tension. J Phys 1945。 9: 385391,[7] Burke J E, Tumbull D. Recrystallization and grain growth. Prog Met Phys 1952。 3: 220292.[8] Tokita M. Development of largesize ceramicJmetal bulk FGM fabricated by spark plasma sintering. Materials Science Forum 1999。 308311: 8388.
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