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ITS » Master Theses » FISIKA S2
Posted by ita@its.ac.id at 20/02/2010 09:39:54  •  3106 Views


SYNTHESIS OF 61537-Al2O3MgO-STABILIZED-Al2TiO5 FGM BY MULTIPLE INFILTRATION METHOD

Author :
Umaroh, Khusnul ( 1107201733 )




ABSTRAK

Telah dilakukan sintesis FGM 945-Al2O3Al2TiO5- istabilisasi-MgO AAT-MgO dengan metode infiltrasi berulang yaitu menggunakan serbuk 945-Al2O3 korundum sebagai prakeramik dan serbuk MgO sebagai penstabil dengan komposisi berat 0 2 dan 5 serta larutan TiCl3 sebagai prekursor. Prakeramik dibuat dengan penekanan uniaksial dan prasinter pada suhu 1000 oC selama 1 jam. Infiltrasi prakeramik dilakukan dengan larutan TiCl3 dengan pengulangan sebanyak tiga kali kemudian disinter pada suhu 1450 oC selama 3 jam untuk membentuk fasa AT dan pemadatan keramik. Kegradualan komposisi fasa dari FGM berdasarkan kedalaman dianalisis secara kualitatif maupun kuantitatif menggunakan metode Rietveld dari data difraksi sinar-x XRD. Hasil yang bervariasi dari identifikasi fasa dalam sampel pada kedalaman yang berbedapun ditemukan seperti untuk FGM dengan 0 MgO pada permukaan rutile tidak ditemukan adapun untuk FGM dengan komposisi berat 2 MgO pada permukaan tidak ditemukan spinel tetapi spinel muncul pada kedalaman tertentu dan untuk FGM dengan 5 MgO spinel ditemukan pada semua kedalaman dan kandungannnya meningkat berdasarkan kedalaman tersebut. Perhitungan fraksi berat relatif fasa menunjukkan secara umum kandungan AT menurun berdasarkan kedalaman dan sebaliknya kandungan korundum meningkat. Secara umum dapat disimpulkan infiltrasi berulang dapat meningkatkan kandungan AT dengan penambahan MgO dapat mengurangi pembentukan AT dan dengan jumlah MgO yang banyak dapat menghasilkan kandungan spinel yang lebih banyak pula. Kemudian dari uji dekomposisi menunjukkan dengan penambahan MgO pada FGM AAT-MgO dengan komposisi berat 2 dan 5 membuktikan proses dekomposisi termal dapat direduksi dan dari hasil yang telah diperoleh penambahan 2 MgO lebih efesien dalam mereduksi dekomposisi termal dibandingkan dengan penambahan 5 MgO.


ABSTRACT

Synthesis of 945-Al2O3MgO-Al2TiO5 AMgO-AT functionally-graded composite materials FGMs have been done by multiple infiltration method.The synthesis used 945-Al2O3 corundum powder as the green body MgO powder as aluminium titanate Al2TiO5 or AT stabilizer with weight composition 0 2 and 5 and also a solution containing TiCl3 as precursor. The green bodies were made by uniaxial pressing and presintering at temperature of 1000 oC for 1 hour. Green body infiltrations were done three times by the solution continued with sintering at temperature of 1450 oC for 3 hours to produce AT and densify the ceramics. Phase composition gradual character of the FGMs for their various depths were qualitatively and quantitavely analyzed using X-ray diffraction data being the latter with Rietveld method. Various results on the phase identification were found at different depths of the samples. For example for FGM with 0 MgO there was unreacted rutile at the surface while for FGM with 2 MgO spinel was not found at the surface but appeared at the certain depths and for FGM with 5 MgO spinel was found at all depths and its content increased with depth. Calculation of phase relative weight fraction showed that in general AT content reduces with depth but that for corundum increases. In general it can be concluded that multiple infiltration increased AT at content the presence of MgO reduced the formation of AT and more MgO resulted in more spinel. Then from decomposition test shows MgO addition with weight composition 2 and 5 proves can reduce the thermal decomposition of AT and from the results addition with 2 MgO more efficient than 5 to reduce the thermal decomposition of AT



KeywordsFGM ; Infiltrasi berulang ; Aluminium titanat
 
Subject:  Material Komposit
Contributor
  1. Drs. Suminar Pratapa, M.Sc., Ph.D.
Date Create: 20/02/2010
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Master-3100009037115
Collection ID: 3100009037115
Call Number: RTFi 620.118 Uma s


Rights
Copyright @2009 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library




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  1.  ITS-Master-8486-1107201733-ABSTRACT_ID.pdf - 1942 KB
  2.  ITS-Master-8486-1107201733-ABSTRACT_EN.pdf - 1942 KB




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