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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Pengabdian UntukMu NegeRI Turbo : Jurnal Program Studi Teknik Mesin JURNAL PHOTON Jurnal Teknik Mesin Indonesia Journal of Applied Materials and Technology
Ahmad Kafrawi Nasution, Ahmad Kafrawi
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Nursing Physics Social Sciences

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ANALISIS POTENSI LIMBAH TULANG AYAM DAN IKAN DARI PKL SEBAGAI SUMBER MINERAL KALSIUM FOSFAT Nasution, Ahmad Kafrawi; Permata, Ekie Gilang
Sistem Informasi Vol 6 No 02 (2016): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

This study aimed to find out how much potential waste from chicken bones and fish collected from street vendors in the city of Pekanbaru to pulverized bone and mineral calcium phosphate nanoparticle size. This research is motivated by many vendors who are considered disturbing the aesthetics and cleanliness of the city. The research was conducted in the city of Pekanbaru by using primary data obtained from a survey of street vendors. While secondary data obtained from the Office of Market town of Pekanbaru, statistical data and the results of previous studies. Data samples are taken randomly from street vendors in the city of Pekanbaru based on the types of food sold as roasted chicken and fried catfish. The process of making bone powder are derived from chicken and fishbones through several stages. For bone drying process is done at a temperature of 100 OC for 15 minutes. As for the bone turnover process is performed at a temperature of 700 OC for 6 hours. The results showed that the huge potential of the waste bones if used as a source of mineral raw materials Calcium Phosphate. This research could also describe an increase in economic value if it produces powder bone and bone powder with the size of the nanoparticles.
APLIKASI BIOMATERIAL DALAM KARDIOLOGI: STENT KORONARIA Nasution, Ahmad Kafrawi
Sistem Informasi Vol 2 No 2 (2012): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

Research in the field of materials has become widespread. Biomaterials is a term that is aimed at material that is part of medical implants. Biomaterials have been used by humans both to improve appearance and restore organ function. Modern biomaterials are still needed and biofunctionality study of biocompatibility of implants. Biocompatibility must be referring to the material properties to be safe and work in harmony with the body without causing other harmful effects. An important aspect to consider from the biocompatibility of products starting from the fabrication process, corrosion resistance and modification of implant materials and coatings.
PENENTUAN PARAMETER KETEBALAN LAPISAN PROSES ELECTROPLATING PADA ALUMINIUM DAN BAJA Nasution, Ahmad Kafrawi; Nawangsari, Putri; Cahyono, Hendro; -, Mustaqim
Sistem Informasi Vol 4 No 1 (2013): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

Proses perlakuan permukaan dapat dimanfaatkan untuk memperbaiki tampilan dari sebuah logam, satu diantaranya adalah proses pelapisan (electroplating). Untuk mendapatkan tampilan yang bagus dengan waktu yang efektif, parameter pelapisan sangat menentukan. Untuk itu dilakukan penentuan parameter ketebalan lapisan logam paduan aluminium AA5051 dengan waktu pencelupan 30, 40, 50 dan 60 menit dengan tegangan 3 dan 10 Volt. Sedangkan logam plain carbon steel dengan waktu pencelupan 30, 40, 50 dan 60 menit dengan tegangan 3 dan 8 Volt. Dari parameter di atas diperoleh rata-rata laju ketebalan pelapisan untuk logam paduan aluminium AA5051 yang tertinggi 1.40 μm per menit (30 menit pada 10 Volt) dan terendah adalah 1.00 μm per menit (40 menit pada 3 Volt). Dan untuk logam plain carbon steel yang tertinggi 1.77 μm per menit (60 menit pada 4 Volt) dan terendah adalah 0.35 μm per menit (40 menit pada 4 Volt).
PERBANDINGAN NILAI KEKUATAN TARIK KOMPOSIT MENGGUNAKAN METODE HAND LAY UP DAN METODE VARI Utami, Lega Putri; Ginting, Delovita; Nasution, Ahmad Kafrawi; Istana, Budi
Sistem Informasi Vol 9 No 2 (2019): Jurnal Photon
Publisher : Fakultas MIPA dan Kesehatan Universitas Muhammadiyah Riau

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Abstract

Some Types of the method of making composite materials are the Vacuum Assited Resin Infusion (VARI) Method and the Hand Lay Up Method. The purpose of this study was to compare the tensile strength of composite materials made using the hand lay up and VARI methods. The types of fibers used as composite materials are palm frond fibers and matrices used in polyester resin. Composites reinforced with palm fronds are printed using the hand lay up and VARI methods. The results showed the value of composite tensile strength with the hand lay up method of 27.37 MPa and composite tensile strength using the VARI method of 28.40 MPa. From the results of the study, the differences in the tensile strength values of the two methods were obtained.
PELATIHAN KETERAMPILAN LAS UNTUK MASYARAKAT USIA PRODUKTIF DI KELURAHAN SUKAJADI KEC. SUKAJADI KOTA PEKANBARU Sunaryo Sunaryo; Abrar Ridwan; Legisnal Hakim; Ahmad Kafrawi Nasution; Budi Istana
Jurnal Pengabdian UntukMu NegeRI Vol 1 No 1 (2017): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.133 KB) | DOI: 10.37859/jpumri.v1i1.26

Abstract

Jumlah angkatan kerja di Riau pada Februari 2015 mencapai 2.974.014 orang, atau naik 172,849 orang (6,17 persen) dibandingkan jumlah angkatan kerja pada Februari 2014 sebesar 2.801.165 orang. Jumlah penduduk yang bekerja di Riau pada Februari 2015 sebesar 2,774,245 orang atau bertambah 112,918 orang (4,2 persen) dibandingkan dengan keadaan pada Februari 2014. Tingkat pengangguran terbuka pada Februari 2015 sebesar 6,72 persen, lebih tinggi dibandingkan keadaan pada Februari 2014 (4,99 persen). Sebagian besar para remaja putus sekolah usia produktif tidak memiliki keterampilan berwirausaha sehingga tidak bisa mendapatkan atau menciptakan lapangan kerja. Jumlah bengkel las di kecamatan Sukajadi khususnya kelurahan sukajadi relatif masih kurang dibandingkan dengan jumlah pengguna jasa las. Masih kurangnya pembinaan terhadap Sebagian besar Para remaja putus sekolah usia produktif untuk mendapatkan/menciptakan lapangan pekerjaan khususnya dibidang teknik pengelasan. Teknik mesin fakultas teknik UMRI,menyelenggarakan pengabdian dalam bentuk kegiatan pelatihan keterampilan las pada remaja putus sekolah usia produktif di kelurahan Sukajadi Kecamatan Sukajadi kota Pekanbaru , pelatihan dilaksanakan selama lima hari dengan jumlah peserta 10 orang. Para peserta secara langsung praktek dibawah bimbingan dan pengawasan pelaksana pelatihan yang bertindak sebagai instruktur. Metode demontrasi dan peragaan ini sangat efektif untuk pelatihan las , peserta pelatihan menerapkan modul yang telah didiskusikan dengan tim pelaksana, secara langsung pada peralatan las yang telah disiapkan oleh panitia.
Inovasi Material Komposit Poliuretan menggunakan (ZnO:Nanoselulosa dari Serat Tandan Kosong Buah Kelapa Sawit) Sebagai Penguat Absorbsi Suara dan Insulasi Termal Sunaryo, Sunaryo; Nasution, Ahmad Kafrawi; Israyandi, Israyandi; Nurrahmawati, Puji; Wulandari, Gerhana; Rafhan, Muhammad; Ilhami, Ibnu Zaki; Yudho, Agung Laksono
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2742

Abstract

Inovasi material pada pengembangan serat alam terus dikembangkan. Indonesia yang memiliki keanekaragaman hayati yang sangat banyak dan memiliki peluang yang besar untuk mengeksplorasi pemanfaatan material serat alam. Serat tandan kosong kelapa sawit (TKKS) memiliki karakterisasi penyerapan suara dan material insulasi termal. Penelitian ini melakukan biosintesis nanopartikel ZnO pada nanoselulosa dari serat tandan kosong kelapa sawit untuk dijadikan material komposit. Material komposit ini nantinya digunakan sebagai pengabsorbsi suara dan panas untuk inovasi dalam dunia otomotif dengan keluhan kebisingan dan panas yang seringkali mengganggu pengemudi. Tahapan pada penelitian ini dengan mengkarakterisasi fraksi massa dari nanoselulosa dan penambahan ZnO dari serat TKKS yang digunakan adalah 5% dan 10% fraksi komposit dengan polyuretan adalah 15%. Pengujian yang dilakukan dalam penelitian ini adalah Uji koefisien Absorbsi suara, Uji SEM, Uji Densitas dan Uji Konduktivitas Termal. Serta luaran yang ditargetkan dalam penelitian ini adalah memanfaatkan serat TKKS sebagai material inovasi material baru untuk interior otomotif dalam hal insulasi suara dan insulasi termal.
Measurement of the Adhesion of PCL/Hydroxyapatite Nanofibrous Composite Coatings in Relation to the Roughness of Metal Implant Materials Nasution, Ahmad Kafrawi; Sunaryo, Sunaryo; Gunawan, Rendy
Jurnal Teknik Mesin Indonesia Vol. 19 No. 2 (2024): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v19i02.744

Abstract

Composite coatings have been widely used to modify the surface of materials to improve material properties alongside chemical modification, ion implantation, anodic oxidation, physical vapor deposition, chemical vapor deposition, plasma spray deposition, sol-gel, and thermal oxidation. Modifying the surface coating of bio-implants must employ suitable materials to enhance the interaction between bone cells and the material and provide structural support for forming new tissue. Coating requirements in metal implant material engineering include fiber diameter, porosity, mechanical properties (adhesion), biodegradability, and bioactivity. This study's most recent innovation consisted of modifying the bio-implant surface layer with a polymer (polycaprolactone, PCL) and bioactive ceramic (hydroxyapatite, HA) to meet the requirements of metal implant material application. During the spraying procedure, parameters derived from previous studies are used to determine fabrication parameters. In addition, the adhesion (mechanical properties) will be measured at multiple levels of implant material roughness. The results indicate that the rougher surface of the substrate has a higher adhesion value than the finer surface of the material.
Failure Evaluation of Thermal Spray Coating Using High-Velocity Oxy-Fuel (HVOF) on Steam Turbine Shaft 940-PT 2 A/B Siregar, Banuaran Ibrahim; Nasution, Ahmad Kafrawi; Istana, Budi
Journal of Applied Materials and Technology Vol. 5 No. 2 (2024): March 2024
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.5.2.63-69

Abstract

The repair of worn steel shaft surfaces in power transmission systems is made possible by thermal spray procedures, which have become an essential technology in many sectors. With this novel approach, worn shaft components may be recycled effectively since an API 687-compliant wear-resistant coating designed for specialty rotating equipment repairs is applied. The process's efficacy stems from its capacity to extend the functional life of essential mechanical components, therefore decreasing replacement expenses and downtime. The variety of factors that affect the result highlights the intricacy of thermal spray techniques. Finding the ideal mix of these crucial process variables becomes essential to provide the required degree of wear resistance. The coated shafts perform better as a result of this careful tuning, which also guarantees dependability under challenging working conditions. The coated shafts' surface hardness data in this investigation showed that the initial coating hardness value was below the predetermined goals. Several parts that interact with the shaft were redesigned strategically in response to these discoveries. These adjustments were mainly motivated by economic considerations, to optimize effectiveness while resolving the noted hardness deficiencies. Furthermore, a thorough analysis of failure data showed important correlations between different operational parameters and how they interacted, offering a further understanding of how these factors affected wear resistance. This research allowed for the identification of crucial parameters that required change and emphasized the precise balance essential for optimum thermal spray application. All things considered, this study emphasizes how critical it is to use a methodical approach to improve thermal spray processes, guarantee successful shaft component restoration, and ultimately increase the operational longevity of such components in challenging applications.
The Effect of Motorcycle Wheels (Original Equipment Manufacturer) Reconditioning Process on Mechanical Properties and Microstructure Nasution, Ahmad Kafrawi; Alfindo; Sunaryo
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 9 No 2 (2024): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v9i2.1714

Abstract

Wheels are an essential component of a vehicle. Material damage or failure on casting wheel-type wheels is primarily because these wheels receive a reasonably hard impact load due to uneven road conditions or potholes. This condition makes the wheels unable to function normally, and components must be replaced. Given the relatively high cost of replacing wheels, several options are offered to vehicle owners (consumers) to have their wheels reconditioned. This study aims to analyze the effect of the reconditioning process on the mechanical properties and microstructure of the casting wheel material. The sample material is taken from the Original Equipment Manufacturer (OEM) wheel casting wheel in the Disk section for impact testing, Rim for hardness, and microstructure tests. The results are that the reconditioning process affects the mechanical properties and microstructure of the original equipment manufacturer (OEM) alloy wheel material. The decrease in hardness value was 68.86 HBW to 61.59 HBW from the conditions before and after reconditioning. The impact test results where the impact energy absorption is greater after reconditioning is 29.24 J, and the average impact value for wheel specimens after reconditioning is 0.2902 J/mm2. The impact energy value before reconditioning is 7.87 J, and the average impact value is 0.0973 J/mm2. The microstructure obtained is hypereutectic, and the reconditioning process has little effect on the dendritic structure.
Inovasi Material Komposit Poliuretan menggunakan (ZnO:Nanoselulosa dari Serat Tandan Kosong Buah Kelapa Sawit) Sebagai Penguat Absorbsi Suara dan Insulasi Termal Sunaryo, Sunaryo; Nasution, Ahmad Kafrawi; Israyandi, Israyandi; Nurrahmawati, Puji; Wulandari, Gerhana; Rafhan, Muhammad; Ilhami, Ibnu Zaki; Yudho, Agung Laksono
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2742

Abstract

Inovasi material pada pengembangan serat alam terus dikembangkan. Indonesia yang memiliki keanekaragaman hayati yang sangat banyak dan memiliki peluang yang besar untuk mengeksplorasi pemanfaatan material serat alam. Serat tandan kosong kelapa sawit (TKKS) memiliki karakterisasi penyerapan suara dan material insulasi termal. Penelitian ini melakukan biosintesis nanopartikel ZnO pada nanoselulosa dari serat tandan kosong kelapa sawit untuk dijadikan material komposit. Material komposit ini nantinya digunakan sebagai pengabsorbsi suara dan panas untuk inovasi dalam dunia otomotif dengan keluhan kebisingan dan panas yang seringkali mengganggu pengemudi. Tahapan pada penelitian ini dengan mengkarakterisasi fraksi massa dari nanoselulosa dan penambahan ZnO dari serat TKKS yang digunakan adalah 5% dan 10% fraksi komposit dengan polyuretan adalah 15%. Pengujian yang dilakukan dalam penelitian ini adalah Uji koefisien Absorbsi suara, Uji SEM, Uji Densitas dan Uji Konduktivitas Termal. Serta luaran yang ditargetkan dalam penelitian ini adalah memanfaatkan serat TKKS sebagai material inovasi material baru untuk interior otomotif dalam hal insulasi suara dan insulasi termal.
Co-Authors Abrar Ridwan Alfindo Budi Istana Delovita Ginting, Delovita Hendro Cahyono, Hendro Ilhami, Ibnu Zaki Israyandi Israyandi Lega Putri Utami Legisnal Hakim Mustaqim - Nurrahmawati, Puji Permata, Ekie Gilang Putri Nawangsari, Putri Rafhan, Muhammad Rendy Gunawan Siregar, Banuaran Ibrahim Sunaryo Sunaryo Sunaryo Sunaryo Sunaryo Wulandari, Gerhana Yudho, Agung Laksono