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Harsono Wirjosumarto
Mechanical Engineering Department, Institute of Technology Bandung
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics

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Recovery and Stacking Faults of α Ag-Sn Alloys Harsono Wirjosumarto
Journal of Mathematical and Fundamental Sciences Vol. 9 No. 2 (1975)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract. X-ray diffraction peak shift can be used to determine the recovery temperature of face centered cubic metals. Using this method is was found that filed α Ag-Sn chips recover at temperature between 100° and 200°C. The stacking fault energy was found to be decreasing with increasing tin content.  Ringkasan. Penggeseran puncak difraksi sinar-X dapat dipergunakan untuk menentukan temperatur pemulihan dari logam-logam dengan struktur kubus berpusat sisi. Dengan cara tersebut dapat ditentukan bahwa serbuk kikiram dari α Ag-Sn pulih kembali pada temperature antara 100° dan 200°C. Diketemukan pula bahwa energi salah tumpuk dari panduan-tersebut berkurang dengan bertambahnya konsentrasi timah putih.
The Growth and Orientation of Platelet Ag3Sn Single Crystals Harsono Wirjosumarto
Journal of Mathematical and Fundamental Sciences Vol. 9 No. 1 (1974)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Kristal-kristal tunggal Ag3Sn pipih dengan tebal 200 μm dan 5 mm pada dimensi yang lain, dapat dihasilkan dengan cara "temperature gradient" dari suatu ingot Ag-Sn dengan komposisi 40% berat Ag dan 60% berat Sn. Permukaan bidang pipih dari Kristal-kristal tunggal yang didapat mempunyai bidang kristalografi yang sama. Dengan cara difraksi sinar X, dapat ditunjukkan bahwa bidang tersebut adalah bidang (020).Platelet single crystals of Ag3Sn of 200 μm thickness and 5 mm in the other dimensions can be produced by temperature gradient method from an ingot of Ag-Sn alloy with a composition of 40 wt % Ag and 60 wt % Sn. It was found that the platelet surfaces have the some crystallographic plane. X-ray diffraction study showed that the plane is (020) plane.
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