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ITS » Master Theses » FISIKA S2
Posted by anis at 10/06/2009 16:25:55  •  4004 Views


ANALISIS PEMBENTUKAN MATERIAL NANOKRISTAL DARI MATERIAL AMORF BERBASIS ZIRKONIUM PADA TEMPERATUR 3900-4100C

AN ANALYSIS OF NANOCRYSTAL MATERIAL FORMING FROM AMORF MATERIAL BASED ON ZIRCONIUM AT 3900-4100C

Author :
Fajarin, Rindang 




ABSTRAK

Telah dilakukan analisis pembentukan material nanokristal dari material amorf berbasis Zirkonium. Material amorf berbasis Zirkonium Zr-Cu-Ni-Alvariasi komposisi dan Zr-Cu-Ni-Al-Si dipanaskan pada temperatur antara Tg dan Tx yaitu 3900 4000 dan 4100C selama 1 jam. Paduan yang sudah dipanaskan diidentifikasi fasa yang terbentuk dan ukuran kristal dengan menggunakan difraksi sinar-x. Identifikasi fasa dilakukan dengan metode pencocokan dengan tabel fasa terbentuk dari JCPDF sedangkan ukuran kristal dihitung dengan persamaan Scherrers yang telah dikoreksi dengan faktor geometri alat. Hasil identifikasi fasa menunjukkan fasa-fasa yang terbentuk antara lain fasa oksida ZrO2 dengan struktur tetragonal monoklinik fasa oksida Zr3O1-x dengan struktur rhombohedral serta fasa intermetalik Ni7Zr2 Cu10Zr7 Zr2Cu dan Zr2Ni. Ukuran fasa oksida ZrO2 antara 7-47 nm fasa oksida Zr3O1-x antara 68-225 nm dan fasa intermetalik antara 9-40 nm. Sifat mekanik dari paduan dapat diketahui dari hasil uji HVN Hardness Vickers Number dimana didapatkan nilai kekerasannya antara 73-204. Untuk paduan Zr-Cu-Ni-Al dan Zr-Cu-Al-Pd nilai kekerasan semakin meningkat seiring dengan meningkatnya temperatur pemanasan. Sedangkan untuk paduan Zr-Cu-Ni-Al-Si nilai kekerasannya turun hal ini dikarenakan penambahan unsur Si pada paduan. Uji korosi dilakukan dengan menggunakan larutan HNO3 1 M selama 5 10 dan 15 menit. Semakin tinggi temperatur pemanasan semakin besar pula nilai laju korosinya. Elemen pemadu dan komposisi memiliki peranan yang signifikan. Paduan 4 komponen dan 5 komponen lebih tahan terhadap kristalisasi dibandingkan paduan 3 komponen. Paduan dengan komposisi Zr terbesar mempunyai ketahanan korosi yang paling baik.


ABSTRACT

The forming of nanocrystal material from amorf material based on Zirconium has been analizied. Amorf material based on Zirconium Zr-Cu-Ni-Al vary in composition and Zr-Cu-Ni-Al-Si are heated at the temperature between Tg and Tx 3900 4000 and 4100 for an hour. The heated alloys are identified their formed phase and crystal size by x-ray diffraction. Phase identification is done by search match with formed phase table methode of JCPDF while the crystal size is calculated by Scherrers equation which has been corrected with devise geometry factor. Phase identification result shows the formed phases are ZrO oxide with tetragonal structure monoclinic Zr3O1-x oxide with rhombohedral structure and intermetallic Ni7Zr2 Cu10Zr7 Zr2Cu and Zr2Ni. The phase size of ZrO2 oxide is between 7-47 nm Zr3O1-x oxide is between 68-225 nm and intermetallic phase is between 9-40 nm. The mechanical properties of alloys can be found from HVN Hardness Vickers Number test result. The hardness value for alloys are between 73-204. For Zr-Cu-Ni-Al and Zr-Cu-Al-Pd alloy the hardness value is increase as higher heating temperature. While for Zr-Cu-Ni-Al-Si it is decrease since the adding of Si. Corrosion test is done in use of HNO3 1 M for 5 10 and 15 minute. The higher heating temperature the bigger corrosion rate. Additional element and composition have a significant role. 4 component and 5 component alloy are more resistant to crystalisation than 3 component alloy. Alloy with the highest composition of Zr has the best resistantion of corrosion.



KeywordsElemen Pemadu ; Gelas Metalik ; Nanokristal
 
Subject:  Nanocrystals ; Nanostructured materials
Contributor
  1. Dr. Triwikantoro M.Sc
Date Create: 10/06/2009
Type: Text
Format: pdf.
Language: Indonesian
Identifier: ITS-Master-3100008033156
Collection ID: 3100008033156
Call Number: RTFi 620.5 Faj a


Source
Master Theses, MAGISTER PROGRAMME DEPARTMENT OF PHYSICS RTFi 620.5 Faj a, 2008

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