Metalurgija最新文献_第2页

KONTRIBUSI ADITIF SUCCINONITRILE (SN) PADA PERFORMA ELEKTROLIT PADAT LIBOB UNTUK BATERAI LI-ION LIBOB对LION-BATERS电解改性对琥珀酸酯（SN）的添加剂贡献

IF 0.6

Metalurgija Pub Date : 2020-10-25 DOI: 10.14203/metalurgi.v35i2.546

Qolby Sabrina, Titik Lestariningsih, Christin Rina Ratri, Latifah Hanum Lalasari

{"title":"KONTRIBUSI ADITIF SUCCINONITRILE (SN) PADA PERFORMA ELEKTROLIT PADAT LIBOB UNTUK BATERAI LI-ION","authors":"Qolby Sabrina, Titik Lestariningsih, Christin Rina Ratri, Latifah Hanum Lalasari","doi":"10.14203/metalurgi.v35i2.546","DOIUrl":"https://doi.org/10.14203/metalurgi.v35i2.546","url":null,"abstract":"Pengembangan elektrolit polimer padat untuk substitusi elektolit cair bertujuan untuk mengurangi kebocoran pada sistem baterai. Performa elektrolit polimer padat masih terus ditingkatkan agar memiliki konduktifitas ionik sebanding dengan performa elektrolit cair. Salah satu upaya peningkatan performa elektrolit polimer padat dengan menambahkan Succinonitrile (SN). SN merupakan matriks serbaguna untuk menghantarkan Li-ion dalam elektrolit padat, tingginya polaritas SN diharapkan dapat membantu pemisahan ion lithium yang berasal dari garam elektrolit LiBOB. Peningkatan mobilitas ion akan menghasilkan konduktifitas ion yang tinggi. Penambahan Jumlah SN dalam pembuatan elektrolit padat dibuat bervariasi dengan metode mixing slurry dan solution casting. Hasil karakterisasi FESEM dan XRD dengan penambahan SN 32% memperlihatkan adanya lubang pori dan mempunyai bentuk struktur amorf, hal ini akan memudahkan ion lithium untuk berpindah secara merata. Hasil pengujian TGA/DSC menunjukkan elektrolit polimer padat akan mengalami kestabilan sampai pada temperatur 117oC dengan kehilangan berat sebesar 25,1% dan nilai derajad kristalinitas adalah paling kecil. Penambahan SN 32% menunjukkan jendela tegangan stabilitas elektrokimia 2.2 volt cukup lebar dari hasil karakterisasi Linier Sweep Voltammetry. Pengukuran konduktifitas ionik dilakukan menggunakan EIS, hasilnya memperlihatkan nilai konduktifitas elektrolit polimer padat dengan penambahan SN 32% sebesar 6,711x10-8 S/cm, masih lebih kecil bila dibandingkan dengan kisaran nilai konduktifitas elektrolit cair. Optimasi jumlah penambahan SN pada elektrolit padat masih harus dilakukan untuk mencapai performa baterai yang lebih baik.","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"35 1","pages":"57"},"PeriodicalIF":0.6,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45148056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

CAVITATION-EROSION STUDY IN ELBOW TUBES OF A LOW-PRESSURE EVAPORATOR OUTLET HEADER 低压蒸发器出口集箱弯头管空化冲蚀研究

IF 0.6

Metalurgija Pub Date : 2020-08-03 DOI: 10.14203/metalurgi.v35i1.561

D. N. Adnyana

{"title":"CAVITATION-EROSION STUDY IN ELBOW TUBES OF A LOW-PRESSURE EVAPORATOR OUTLET HEADER","authors":"D. N. Adnyana","doi":"10.14203/metalurgi.v35i1.561","DOIUrl":"https://doi.org/10.14203/metalurgi.v35i1.561","url":null,"abstract":"This paper presents the results of the cavitation-erosion study that occurred on elbow tubes that connected to the low-pressure (LP) Evaporator outlet header on a heat-recovery steam generator (HRSG) unit. Inside the elbow tubes flow the working fluid in the form of hot water with a pressure of 10 bar and a temperature of 160° C. Elbow tubes are made of low carbon steel, have an outer diameter of 31.8 mm and a wall thickness of 2.6 mm. Before entering into the elbow tubes, the working fluid warms up inside the evaporator tubes panel using hot flue gases coming from a gas turbine power plant unit. In this study there were 4 (four) pieces of post-service elbow tubes used, namely elbow tube with the connecting angle of 90°, 75°, 60° and 45°. The types of tests carried out included macroscopic tests, chemical analysis, metallographic examinations, hardness tests and EDS (energy dispersive spectroscopy) analysis. The study results obtained show that the elbow tubes undergo a process of thinning on the inner wall of the outer curvature with a rough and jagged surface appearance. This type of failure is known cavitation- erosion. The level of cavitation-erosion that occurs is very much influenced by the elbow’s connecting angle with the LP Evaporator header outlet. The greater the connecting angle or the smaller the radius of the elbow tube, the higher the level of cavitation-erosion that occurs. The high rate of cavitation-erosion experienced by the four elbow tubes is also related to the level of turbulence of the working fluid flow that occurs in the elbow tube. The increase in turbulence that occurs is caused by a decrease in the pressure of the working fluid in the evaporator panel so that some part of the working fluid turns into steam and produces a two-phase flow consisting of a mixture of water and steam","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"35 1","pages":"33-42"},"PeriodicalIF":0.6,"publicationDate":"2020-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42452799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LAPISAN FLAME SPRAYED SS430-AL PADA BAJA KARBON: STRUKTUR DAN KETAHANAN OKSIDASI TEMPERATUR TINGGI 火焰喷涂SS430-AL水碳：高温氧化产物的结构与含量

IF 0.6

Metalurgija Pub Date : 2020-08-02 DOI: 10.14203/metalurgi.v35i1.550

Muhammad Fahmi, S. Sutrisno, Bambang Hermanto, T. Sudiro

{"title":"LAPISAN FLAME SPRAYED SS430-AL PADA BAJA KARBON: STRUKTUR DAN KETAHANAN OKSIDASI TEMPERATUR TINGGI","authors":"Muhammad Fahmi, S. Sutrisno, Bambang Hermanto, T. Sudiro","doi":"10.14203/metalurgi.v35i1.550","DOIUrl":"https://doi.org/10.14203/metalurgi.v35i1.550","url":null,"abstract":"Pada penelitian ini, telah dilakukan proses pelapisan serbuk SS430 murni dan SS430-10Al pada substrat baja karbon rendah dengan teknik flame spray guna meningkatkan ketahanannya terhadap oksidasi pada temperatur tinggi. Untuk menganalisa ketahanan oksidasi dari lapisan tersebut, masing-masing sampel diuji oksidasi pada temperatur 550°Cselama 10 siklus dengan sampel pembanding adalah baja karbon tanpa pelapisan. Struktur lapisan yang terbentuk pada permukaan sampel sebelum dan sesudah uji oksidasi dianalisa dengan menggunakan X-Ray Diffractometer (XRD) danScanning Electron Microscope-Energy Dispersive X-ray Spectroscopy (SEM-EDX). Analisis XRD lapisan hasil flame spray sebelum uji oksidasi menunjukkan bahwa lapisan SS430 murni tersusun atas fasa (Fe-Cr) dan lapisan SS430-10 Al terdiri atas fasa (Fe-Cr) dan Al. Hasil analisis mikrostruktur pada lapisan hasil flame spray menunjukkan bahwa dengan penambahan alumunium, lapisan yang terbentuk lebih tebal dan mengikat dengan tingkat porositas yang lebih sedikit. Namun, evaluasi oksidasi menunjukkan bahwa lapisan SS430 murni memiliki ketahanan terhadap oksidasi yang lebih baik dibandingkan dengan lapisan SS430-10Al dan substrat tanpa coating.","PeriodicalId":18462,"journal":{"name":"Metalurgija","volume":"35 1","pages":"19-26"},"PeriodicalIF":0.6,"publicationDate":"2020-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44045224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soportes mínimos, efectos máximos 最小支持，最大效果

IF 0.6

Metalurgija Pub Date : 2020-07-26 DOI: 10.24215/4516643e017

María Elena Lucero

引用次数: 0

Una mirada sobre el guion de Tejen Tejen剧本一瞥

IF 0.6

Metalurgija Pub Date : 2020-07-26 DOI: 10.24215/4516643e021

P. Moreno

引用次数: 0

Argentina de pie 阿根廷馅饼