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All Journal Jurnal Ilmiah Teknologi dan Rekayasa INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Teknik Mesin Indonesia International Journal of Engineering Continuity Jurnal Ekonomi, Teknologi dan Bisnis Journal of Applied Science and Advanced Engineering
Haryadi, Deni
Gunadarma University
Aerospace Engineering Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Study of First Principles of Mg-Si Binary Systems as Precipitates from T6 Heat Treatment of AL-MG-SI ALLOYS Deni Haryadi; Haris Rudianto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 01 (2020): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.64 KB) | DOI: 10.13057/ijap.v10i01.28912

Abstract

One of the purposes adding the two main alloying elements Si and Mg in small quantities (≈ 1%) on Aluminum is to form strengthening precipitates in aluminium alloy, which typically contribute with a fivefold strength increase from pure aluminum. In the last decades, the investigation has begun to understand the structure and formation of the different phases during heat treatment. An important precipitate in Al-Mg-Si Alloy is β" and β.  when the Precipitate β is created after β" is that the strength suddenly drops and the alloy is said to be overaged. By means of a first-principles supercell approach and density functional theory calculations, this research studied precipitate energy and interface energy of precipitate β" and β. Results show that precipitate β have precipitate energy higher then β" but have interface energy lowers then β". And each low energy interface was found possesses interface with the Al matrix is fully incoherent. The final result of calculation and simulation values for the interfacial energies, precipitate energies and strain energies that can be used in future predictions of the characteristic precipitate.
Carbon-based Microheaters: A Review of Materials, Fabrication, Modelling, and Application Rachmat Anggi Marvianto; Deni Haryadi; Rinto Hidroyuwono; Pieter Karnoman Tutupoly; Yunus Bakhtiar Arafat
International Journal of Engineering Continuity Vol. 5 No. 1 (2026): IJEC
Publisher : Sultan Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58291/ijec.v5i1.579

Abstract

This review evaluates how carbon material selection, fabrication, and multiscale heat transport jointly determine the performance of carbon-based microheaters, with emphasis on graphene, carbon nanotubes (CNTs), amorphous carbon, functionalized carbon fibers, and selected transferable carbon nanostructures. A structured narrative synthesis of 70 Scopus-indexed references spanning 2003-2026 distinguishes direct microheater demonstrations from supporting material, modelling, and adjacent-transfer evidence. Direct evidence shows that graphene and CNT heaters enable rapid, low-power heating and mechanically compliant architectures, while printed or laser-written and functionalized carbon systems broaden flexible and structural applications. Recent process advances include multizone chemical vapor deposition, laser writing, and standardized printed-heater assessment; adjacent evidence on carbon-dot encapsulation and interface engineering is treated as transferable rather than as direct heater performance. Persistent gaps are temperature uniformity, reproducible doping and functionalization, wafer-scale process consistency, and experimentally validated multiscale models. The review contributes an integrated material-fabrication-transport-application framework and an evidence-aware roadmap for future carbon-based microheater design.
Co-Authors Ahmad Yuhani Aji Abdillah Kharisma Dhira, Pandya Emy Haryatmi Hamzah Ali Nashirudin Hamzah Ali Nashirudin Hamzah Ali Nashirudin Haris Rudianto Haris Rudianto Iwan Setyawan Komarudin Komarudin Mohamad Yamin Mohammad Samsul Bakhri NURUL HIDAYAH Pieter Karnoman Tutupoly Rachmat Anggi Marvianto Ridwan Ridwan Rinto Hidroyuwono Rudianto, Haris Soibatul Aslamia Sri Poernomo Sari Tresna P. Soemardi Willy Anderson, Willy Yudan Whulanza Yunus Bakhtiar Arafat Zaenal Ikhsan Abdullah