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"Characterization of pellet mixture of oxyde uranium and oxyde zirconium that is sintering process product. Characterization of nixture pellet UO2 and ZrO2 result of sintering process has been done as a mean to knows hardness character , microstructure, grain size and pellet density...."

"The influence of oxidation soaking time on the micro-strain of oxidation product of rejected UO2 sintered pellet. The possibility of unexpected rejected UO2 sintered pelet from fabrication process came from, such as crack sintered pellet, the size of pore,unacceptable pellet dimension, therefore those pellet was called rejected sintered pewllet...."

"Hydroxyapatite atau Hap adalah material keramik yang digunakan sebagai biomatrial dan mempunyai ketangguhan yang rendah.. Dalam rangka meningkatkan ketangguhannya, serbuk logam platinum ditambahkan untuk memperkuat Hap. Penelitian ini dilakukan untuk me ngetahui pengaruh penambahan Pt pada komposit Hap. Material yang digunakan adalah serbuk Hap dan serbuk ammonium chioroplatinate kemudian diproses untuk menghasilkan pelet sinter komposit Hap Pt. Pada proses tersebut tekanan pengonzpakan dan .suhu sinter divariasi, produk akhir yaitu pelet sinter dikarakterisasi menggunakan SEM, XRD dan pengujian kekerasan.Hasil yang diperoleh menunjukkan bahwa densitas relatif komposit Hap pada variasi tekanan pengompakan lebih rendah dibanding dengan Hap murnipada tekanan yang sama, hal yang sama terjadi pada variusi suhu sinter. Hasil pengujian kekerasan pun mentherikan kecenderungan yang saina pula, hal sebaliknya terjadi prosentase porositas. Meningkatnya tekanan kompaksi dan suhu sinter berpengaruh pada kekerasan, kekerasan komposit Hap Pt lebih rendah daripada Hap murni. Hal ini terjadi karena adanya Pt meningkatkan duktilitas komposit Hap Pt dan darl pola djfraksi sinar X menunjukkan tidak ada reaksi antara Pt dengan Hap akan tetapi pada suhu tinggi sebagian kecil Hap terdekomposisi mEnjadi whitlockite.

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Hap is a ceramic material, which is used as a biomaterial and has a low toughness. In order to improve the toughness, platinum metal powder was added to reinforced Hap. This research has been conducted, to identify the influence of Pt in Hap. The raw materials used in this research were flap and ammonium chloroplatinate and they were treated to produce flap Pt composites. During the treatment of the material, it was found that the compression load and sintering were varied. After finalising the treatment, the sintered pellet was characterised using SEM, XRD and micro-hardness test.

Hence, the result showed that the relative density of Hap composites at various: compression load was lower than pure Hap in a similar condition and the same goes for various sintering temperature. The trend of hardness is similar to the relative density. However, the percentage porosity is opposite. For increasing load compression and sintering temperature, the hardness of Hap composites is lower than pure Hap. Those caseshappened due to the present of Pt, which has increased the ductility and did not play the role in sintering process. However, in the (-ray diffraction pattern, there was no reaction between Hap and Pt but some of Hap .decomposed :to whitloclilte and chloroapatite."