scholarly journals Efek Temperatur Tinggi Pada Pembentukan Komposit Kalsium Pirofosfat Dengan Penambahan Alumina Dan Zirkonia

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Faisal Akbar

Kalsium Pirofosfat (CPP: ) adalah biomaterial yang berbasis kalsium fosfat yang telah digunakan secara luas dalam bidang medis seperti perbaikan dan penggantian jaringan tulang yang rusak. Secara kimiawi CPP sangat mirip dengan komponen mineral tulang dan gigi manusia. Namun, kekuatan mekanik yang rendah pada material berbahan kalsium fosfat  menjadi masalah yang harus diselesaikan. Tambahan zat penguat berupa  dan  diperlukan untuk untuk mendapatkan fase matriks dan juga fase penguatan dalam penerapan bioimplant karena biokompatibilitas yang superior, ketahanan oksidasi dan ketahanan haus. Untuk itu dilakukan penambahan   sebanyak 5% dan 10% pada CPP sintesis dari cangkang kerang. Proses pencampuran komposit dan CPP menggunkan metode High Energy Milling dengan Ball Powder Ratio sebesar 5:1 selama 30 menit kemudian diberi heat treatment pada temperatur 1000°C selama 1 jam. Hasil XRD menunjukkan bahwa tiap material campuran mengalami dekomposisi menjadi  dan  serta mendapatkan produk sampingan berupa calcium aluminate dan calcium zirconium oxide. Untuk ukuran mikrostruktur CPP setelah proses mixing dan heat treatment mengalami penyusutan yang cukup signifikan. Hal tersebut bisa dilihat dari ukuran partikel CPP yaitu sebesar 1,5 ±0,8 µm, tetapi setelah dicampurkan dengan 5%  dan proses heat treatment 1000°C ukuran partikel menjadi 1,087 ± 0,6 µm atau mengecil 27,5% dari ukuran sebelumnya.

2015 ◽  
Vol 41 (10) ◽  
pp. 14326-14331 ◽  
Author(s):  
Sun-A Jung ◽  
Hanjung Kwon ◽  
Chang-Yul Suh ◽  
Jung-Min Oh ◽  
Wonbaek Kim

2010 ◽  
Vol 658 ◽  
pp. 340-343 ◽  
Author(s):  
Jian Feng Zhu ◽  
Guo Quan Qi ◽  
Fen Wang ◽  
Hai Bo Yang

Ti2AlC powders with high purity were successfully synthesized via high energy milling and heat treatment of Ti, C and Al powders. The effects of composition and thermal treatment on the formation and purity of Ti2AlC were examined in detail. The results shown a mechanically induced self-propagating reaction (MSR) was triggered to form Ti3AlC2, TiC and TiAlx during the high energy milling. When the as-milled powders were heat treated, Ti2AlC was initially formed by the reaction between TiAl and TiC. With continuously increasing temperature, Ti2AlC was also produced by the reaction between TiAl and Ti3AlC2.


2013 ◽  
Vol 178 (19) ◽  
pp. 1352-1355
Author(s):  
A.V. Trifu ◽  
E. Dorolti ◽  
A.F. Takacs ◽  
I. Chicinaş ◽  
O. Isnard ◽  
...  

2019 ◽  
Vol 45 (10) ◽  
pp. 13464-13471 ◽  
Author(s):  
Junrui Yang ◽  
Zhongxia Liu ◽  
Ruibin Yang ◽  
Qian Zhi ◽  
Mengjie Yang ◽  
...  

2010 ◽  
Vol 658 ◽  
pp. 89-92 ◽  
Author(s):  
Jian Feng Zhu ◽  
Guo Quan Qi ◽  
Hai Bo Yang ◽  
Fen Wang

Ti2AlC/Al2O3 nanocomposites were synthesized by high energy milling with Ti, C, Al and TiO2 as initial materials. The formation and evolution of phases in high energy milling and following heat treatment were investigated by X-ray diffractometer (XRD). The results show that the raw materials of Ti, C, Al and TiO2 were pulverized to ultrafine particles, and some of them transformed to amorphous phase. When the as-milled powders were heat treated in vacuum atmosphere, TiC was firstly produced and released large amount of reactive heat, which resulted in the reaction between Ti and Al to produce intermediate phases of the TixAly (TiAl3, TiAl, and Ti3Al) intermetallics. The reaction between Al and TiO2 produced Al2O3 phase. The TixAly intermetallics and the residual Ti and Al transformed to TiAl equilibrium phase. Finally, the TiAl intermetallics and the TiC reacted to yield Ti2AlC, which produced Ti2AlC/Al2O3 nanocomposite together with the former in-situ formed Al2O3.


2010 ◽  
Vol 658 ◽  
pp. 181-184 ◽  
Author(s):  
Jian Feng Zhu ◽  
Guo Quan Qi ◽  
Hai Bo Yang ◽  
Fen Wang

Highly pure Ti3AlC2 powder was fabricated by combination of high energy milling and heat treatment with Ti, C and Al as starting materials. The details of reactions and phase evolution in fabrication process were investigated. The results shown that the Ti-Al intermetallics, Ti3AlC2 and TiC were formed in high energy milling. The as-milled powders were heat treated subsequently, and the Ti3AlC2 powder with high purity was produced from the reaction among Ti-Al intermetallics, Ti3AlC2 and TiC at relative low temperature (1100 °C).


Author(s):  
Nailton T. Câmara ◽  
Rafael A. Raimundo ◽  
Cleber S. Lourenço ◽  
Luís M.F. Morais ◽  
David D.S. Silva ◽  
...  

Author(s):  
Heytor V. S. B. Azevêdo ◽  
Rafael A. Raimundo ◽  
David D. S. Silva ◽  
Luís M. F. Morais ◽  
Franciné A. Costa ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document