Pub Date : 2021-06-22DOI: 10.32523/ejpfm.2021050203
H. Demiroren
In this study, corrosion behaviors of diffuser unit solution by which raw sugar is produced from minced sugar beets in sugar factories on St-37 low alloy steel and AISI 304, 304L, 316 austenitic stainless steel types were examined. Moreover, influence of heat treatment on corrosion resistance was investigated. Corrosion tests were performed using mass loss method. SEM-EDX, X-rays Diffraction, microhardness and surface hardness analyses of samples were carried out. As a result, it was determined that AISI 304L and 316 steels have better corrosive resistance and heat treatment improves corrosion resistance.
{"title":"An overwiew on corrosion behavior of steels in factory","authors":"H. Demiroren","doi":"10.32523/ejpfm.2021050203","DOIUrl":"https://doi.org/10.32523/ejpfm.2021050203","url":null,"abstract":"In this study, corrosion behaviors of diffuser unit solution by which raw sugar is produced from minced sugar beets in sugar factories on St-37 low alloy steel and AISI 304, 304L, 316 austenitic stainless steel types were examined. Moreover, influence of heat treatment on corrosion resistance was investigated. Corrosion tests were performed using mass loss method. SEM-EDX, X-rays Diffraction, microhardness and surface hardness analyses of samples were carried out. As a result, it was determined that AISI 304L and 316 steels have better corrosive resistance and heat treatment improves corrosion resistance.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41780108","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050105
B. Rakhadilov, D. Buitkenov, E. Kabdykenova, Zhuldyz Sagdoldina, L. Zhurerova
The article presents the study results of detonation spraying parameters on the phase composition and tribological properties of NiCr-Al2O3 powder coatings. The spraying was carried out at a ratio of the acetylene-oxygen mixture O2 /C2H2=1.856. The detonation barrel filling volume with an explosive gas mixture varied from 30% to 68%. It is determined that the phase composition of the NiCr-Al2O3 coatings varies depending on the degree of detonation barrel filling. With an increase in the detonation barrel’s filling volume, the intensity of the NiCr diffraction peaks is decreased, and the intensity of the a-Al2O3 reflexes is increased, which indicates an increase in the content of the Al2O3 phase. When low filling volume, there is determined a low coating density and uneven roughness. The tribological test results showed that with an increase in the detonation barrel filling volume, there is a decrease in the wear volume, which confirms the increase in the coatings wear resistance. Determined that the lowest friction coefficient was recorded in the sample obtained at the barrel filling volume 68%. The coatings’ high wear resistance is associated with an increase in the alpha phase volume fraction of a-Al2O3 and coatings density.
{"title":"Effect of the detonation-spraying mode on the tribological properties of NiCr-Al2O3 coatings","authors":"B. Rakhadilov, D. Buitkenov, E. Kabdykenova, Zhuldyz Sagdoldina, L. Zhurerova","doi":"10.32523/EJPFM.2021050105","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050105","url":null,"abstract":"The article presents the study results of detonation spraying parameters on the phase composition and tribological properties of NiCr-Al2O3 powder coatings. The spraying was carried out at a ratio of the acetylene-oxygen mixture O2 /C2H2=1.856. The detonation barrel filling volume with an explosive gas mixture varied from 30% to 68%. It is determined that the phase composition of the NiCr-Al2O3 coatings varies depending on the degree of detonation barrel filling. With an increase in the detonation barrel’s filling volume, the intensity of the NiCr diffraction peaks is decreased, and the intensity of the a-Al2O3 reflexes is increased, which indicates an increase in the content of the Al2O3 phase. When low filling volume, there is determined a low coating density and uneven roughness. The tribological test results showed that with an increase in the detonation barrel filling volume, there is a decrease in the wear volume, which confirms the increase in the coatings wear resistance. Determined that the lowest friction coefficient was recorded in the sample obtained at the barrel filling volume 68%. The coatings’ high wear resistance is associated with an increase in the alpha phase volume fraction of a-Al2O3 and coatings density.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45108317","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050106
D. Kakimzhanov, B. Rakhadilov, Y. Tyurin, O. Kolisnichenko, L. Zhurerova, M. Dautbekov
In this study, the research results of the influence of pulsed plasma treatment on phase composition, hardness, and roughness of Cr3C2-NiCr coatings are presented. The Cr3C2-NiCr coating was applied to substrate 12Kh18N10T stainless steel by detonation spraying method. To change the physical and mechanical properties of sprayed coating’s surface layers, subsequent pulse-plasma treatment was used. The pulse-plasma treatment leads to changing the roughness of Cr3C2-NiCr coating. The results of mechanical tests showed that after pulsed plasma treatment, the hardness of Cr3C2-NiCr coating is increased. Based on X-ray diffraction analysis, it was found that the hardness increasing of coating is associated with phase transformations on the surface layer, in particular, the formation of the oxide phase and an increase in the number of carbide particles.
{"title":"Influence of pulsed plasma treatment on phase composition and hardness of Cr3C2-NiCr coatings","authors":"D. Kakimzhanov, B. Rakhadilov, Y. Tyurin, O. Kolisnichenko, L. Zhurerova, M. Dautbekov","doi":"10.32523/EJPFM.2021050106","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050106","url":null,"abstract":"In this study, the research results of the influence of pulsed plasma treatment on phase composition, hardness, and roughness of Cr3C2-NiCr coatings are presented. The Cr3C2-NiCr coating was applied to substrate 12Kh18N10T stainless steel by detonation spraying method. To change the physical and mechanical properties of sprayed coating’s surface layers, subsequent pulse-plasma treatment was used. The pulse-plasma treatment leads to changing the roughness of Cr3C2-NiCr coating. The results of mechanical tests showed that after pulsed plasma treatment, the hardness of Cr3C2-NiCr coating is increased. Based on X-ray diffraction analysis, it was found that the hardness increasing of coating is associated with phase transformations on the surface layer, in particular, the formation of the oxide phase and an increase in the number of carbide particles.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46950111","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050101
K. Nazarov, B. Mukhametuly, S. Kichanov, T. Zholdybayev, A. Shaimerdenov, K. B. Karakozov, D. Dyussambayev, M. Aitkulov, M. Yerdauletov, P. Napolskiy, M. Kenessarin, E. K. Kalymkhan, N. Imamverdiyev, S. Jabarov
Since 2019, the TITAN neutron radiography and tomography facility have been operating at the WWR-K research reactor. The experimental station is intended for a wide range of applications in various fields of science. Since the launch, several interesting works have been carried out to study the internal features of lithium-ion batteries and geophysical materials. The spatial resolution of the detector system was sufficient to visualize the internal elements of the lithium battery and to separate individual grains of the pyrite mineral in the rock sample. This paper presents the technical parameters of the experimental setup and the results of the recent applied research.
{"title":"Non-destructive analysis of materials by neutron imaging at the TITAN facility","authors":"K. Nazarov, B. Mukhametuly, S. Kichanov, T. Zholdybayev, A. Shaimerdenov, K. B. Karakozov, D. Dyussambayev, M. Aitkulov, M. Yerdauletov, P. Napolskiy, M. Kenessarin, E. K. Kalymkhan, N. Imamverdiyev, S. Jabarov","doi":"10.32523/EJPFM.2021050101","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050101","url":null,"abstract":"Since 2019, the TITAN neutron radiography and tomography facility have been operating at the WWR-K research reactor. The experimental station is intended for a wide range of applications in various fields of science. Since the launch, several interesting works have been carried out to study the internal features of lithium-ion batteries and geophysical materials. The spatial resolution of the detector system was sufficient to visualize the internal elements of the lithium battery and to separate individual grains of the pyrite mineral in the rock sample. This paper presents the technical parameters of the experimental setup and the results of the recent applied research.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46753798","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050103
T. Nurakhmetov, Z. Salikhodzha, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, T. Alibay, B. Sadykova, K. Zhangylyssov, B. Yussupbekova, D. Tolekov
The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy. It is shown that electron-hole trapping centers are formed during the trapping of electrons by anionic complexes and localization of a hole in the lattice in the form of the radical SO4−. The appearance of phosphorescence at 3.0-3.1 eV, 2.6-2.7 eV and 2.3-2.4 eV confirms the creation of electron-hole trap centers.
{"title":"Mechanisms formation of electron-hole trap centers in LiKSO4 crystall","authors":"T. Nurakhmetov, Z. Salikhodzha, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, T. Alibay, B. Sadykova, K. Zhangylyssov, B. Yussupbekova, D. Tolekov","doi":"10.32523/EJPFM.2021050103","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050103","url":null,"abstract":"The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy. It is shown that electron-hole trapping centers are formed during the trapping of electrons by anionic complexes and localization of a hole in the lattice in the form of the radical SO4−. The appearance of phosphorescence at 3.0-3.1 eV, 2.6-2.7 eV and 2.3-2.4 eV confirms the creation of electron-hole trap centers.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44964753","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050104
T. Nurakhmetov, Z. Salikhodzha, K. Zhangylyssov, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, Zh. Azmagambetova, B. Sadykova, B. Yussupbekova, T. Alibay, D. Tolekov, N. Tulebayeva
The nature of the impurity emission center and the energy transfer mechanisms from intrinsic electronic excitations to the Mn2+ impurity centers in the CaSO4 − Mn crystal have been investigated. The methods of vacuum ultraviolet, atomic absorption and luminescence spectroscopy are used in a wide temperature range from 5 K to 300 K. The energy transfer of intrinsic electronic excitations to impurity emission centers in CaSO4 − Mn has been detected.
{"title":"Energy transfer of intrinsic electronic excitation to impurities in the CaSO4 − Mn crystal","authors":"T. Nurakhmetov, Z. Salikhodzha, K. Zhangylyssov, A. Zhunusbekov, A. Kainarbay, D. Daurenbekov, Zh. Azmagambetova, B. Sadykova, B. Yussupbekova, T. Alibay, D. Tolekov, N. Tulebayeva","doi":"10.32523/EJPFM.2021050104","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050104","url":null,"abstract":"The nature of the impurity emission center and the energy transfer mechanisms from intrinsic electronic excitations to the Mn2+ impurity centers in the CaSO4 − Mn crystal have been investigated. The methods of vacuum ultraviolet, atomic absorption and luminescence spectroscopy are used in a wide temperature range from 5 K to 300 K. The energy transfer of intrinsic electronic excitations to impurity emission centers in CaSO4 − Mn has been detected.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41280715","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050102
S. Dabylova, Y. Kopatch, N. Fedorov, D. Grozdanov, I. Ruskov, V. Skoy, K. Hramco, T. Tretyakova, S. Sakhiyev, R. B. Marzhokhov, E. Bogolyubov, V. Zverev, Y. Barmakov
A study of the reaction of inelastic scattering of 14.1 MeV neutrons by 23 Na nuclei was carried out at the TANGRA facility using the tagged neutron method. In this work, the energies of visible g-transitions are determined, the yields of g -quanta are obtained, the angular distributions of g -quanta for 23 Na are measured. The results obtained are in good agreement with the data of other published experimental works.
{"title":"Measuring the yields and angular distributions of g-quanta from the interaction between 14.1 MeV neutrons and sodium nuclei","authors":"S. Dabylova, Y. Kopatch, N. Fedorov, D. Grozdanov, I. Ruskov, V. Skoy, K. Hramco, T. Tretyakova, S. Sakhiyev, R. B. Marzhokhov, E. Bogolyubov, V. Zverev, Y. Barmakov","doi":"10.32523/EJPFM.2021050102","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050102","url":null,"abstract":"A study of the reaction of inelastic scattering of 14.1 MeV neutrons by 23 Na nuclei was carried out at the TANGRA facility using the tagged neutron method. In this work, the energies of visible g-transitions are determined, the yields of g -quanta are obtained, the angular distributions of g -quanta for 23 Na are measured. The results obtained are in good agreement with the data of other published experimental works.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46353260","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}
Pub Date : 2021-03-25DOI: 10.32523/EJPFM.2021050107
D. Ibrayeva, M. Aumalikova, K. Ilbekova, M. Bakhtin, P. Kazymbet, Sh.S. Ibrayeva, K. Zhumadilov
The Stepnogorsk area Northern Kazakhstan has a long history mining activities. Mining activities have lots of environmental and health impacts. The aims of this study were to characterizing the general radiological situation of the area and evaluate radiation exposure by scenarios in settlements. In this study radiological assessment was performed for critical group living in the territory contaminated with radionuclides; working and studying at school located on territory former mining site. The annual dose burden is 2.5 mSv y−1 in Zavodskoy, 1.9 mSv y−1 in Kvartsitka and 3.6 mSv y−1 in Aqsu; and exposure from radon is around 11 mSv y−1 at the ground floor, and for teachers - up to 12 mSv*y−1. At settlements, however, under the hypothesis that all food contaminated with radionuclides and vegetables is cultivated locally in the territories with high background level, exposure from ingestion is 9.1 mSv y−1 in Zavodskoy, 8.3 mSv y−1 in Kvartsitka and 11.5 mSv y−1 in Aqsu. The combined effects of environmental problems have culminated into health problems. There are such possibility of the higher prevalence of cardiovascular, digestive and respiratory systems so it is necessary to evaluate or protect people living in Stepnogorsk area.
哈萨克斯坦北部Stepnogorsk地区有着悠久的采矿活动历史。采矿活动对环境和健康有许多影响。这项研究的目的是描述该地区的一般辐射情况,并根据住区的情况评价辐射照射情况。本研究对生活在受放射性核素污染地区的关键人群进行了放射学评估;在原矿区的学校工作和学习。Zavodskoy的年剂量负担为2.5 mSv y - 1, Kvartsitka的为1.9 mSv y - 1, Aqsu的为3.6 mSv y - 1;一楼的氡暴露量约为11毫西弗* - 1,教师的氡暴露量高达12毫西弗* - 1。然而,在定居点,假设所有受放射性核素污染的食物和蔬菜都是在高本底水平的领土上当地种植的,则在扎沃兹科伊的摄入暴露量为9.1毫西弗,在克瓦茨卡为8.3毫西弗,在阿克苏为11.5毫西弗。环境问题的综合影响最终导致了健康问题。心血管、消化和呼吸系统患病率可能较高,因此有必要对居住在斯捷特诺戈尔斯克地区的人们进行评估或保护。
{"title":"Assessment of radiation exposure in the settlements located in Stepnogorsk area","authors":"D. Ibrayeva, M. Aumalikova, K. Ilbekova, M. Bakhtin, P. Kazymbet, Sh.S. Ibrayeva, K. Zhumadilov","doi":"10.32523/EJPFM.2021050107","DOIUrl":"https://doi.org/10.32523/EJPFM.2021050107","url":null,"abstract":"The Stepnogorsk area Northern Kazakhstan has a long history mining activities. Mining activities have lots of environmental and health impacts. The aims of this study were to characterizing the general radiological situation of the area and evaluate radiation exposure by scenarios in settlements. In this study radiological assessment was performed for critical group living in the territory contaminated with radionuclides; working and studying at school located on territory former mining site. The annual dose burden is 2.5 mSv y−1 in Zavodskoy, 1.9 mSv y−1 in Kvartsitka and 3.6 mSv y−1 in Aqsu; and exposure from radon is around 11 mSv y−1 at the ground floor, and for teachers - up to 12 mSv*y−1. At settlements, however, under the hypothesis that all food contaminated with radionuclides and vegetables is cultivated locally in the territories with high background level, exposure from ingestion is 9.1 mSv y−1 in Zavodskoy, 8.3 mSv y−1 in Kvartsitka and 11.5 mSv y−1 in Aqsu. The combined effects of environmental problems have culminated into health problems. There are such possibility of the higher prevalence of cardiovascular, digestive and respiratory systems so it is necessary to evaluate or protect people living in Stepnogorsk area.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46998415","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}
Pub Date : 2020-12-25DOI: 10.29317/ejpfm.2020040405
B. Rakhadilov, D. Kakimzhanov, G. Botabaeva, D. Buitkenov, Nurgamit Kantay, L. Bayatanova
The article studied the effect of annealing on the structure and properties of zirconium dioxide coatings obtained by detonation spraying. Detonation spraying was realized on a computerized detonation spraying complex of the new generation CCDS2000. Determined that coatings made of zirconium dioxide are characterized by high adhesive strength of adherence to the substrate. Thermal annealing of coated samples was performed at temperatures of 900-1200◦ C. It was determined that the microhardness of zirconium dioxide coatings increases by 10-25% depending on the annealing temperature after annealing. The results of nanoindentation showed that the nanohardness of the coatings after annealing at 1000◦ C increases by 50%. It was determined that after annealing at 1000◦ C, the elastic modulus of the coatings increases, which indicates a decrease in plasticity and an increase in the strength of the coatings. X-ray diffraction analysis showed that the phase composition of coatings before and after annealing consists of t-ZrO2. After annealing occurs there is an increase in the degree of t-ZrO2 tetragonality. Electron microscopic analysis showed that an increase in the number and size of micro-continuity in the form of thin layers after annealing. Determined that increase the hardness of zirconium dioxide after annealing at 900-1200◦ C is associated with a higher degree of tetragonality t-ZrO2 phase.
{"title":"Changes in the structure and properties of ZrO2 detonation coatings during annealing","authors":"B. Rakhadilov, D. Kakimzhanov, G. Botabaeva, D. Buitkenov, Nurgamit Kantay, L. Bayatanova","doi":"10.29317/ejpfm.2020040405","DOIUrl":"https://doi.org/10.29317/ejpfm.2020040405","url":null,"abstract":"The article studied the effect of annealing on the structure and properties of zirconium dioxide coatings obtained by detonation spraying. Detonation spraying was realized on a computerized detonation spraying complex of the new generation CCDS2000. Determined that coatings made of zirconium dioxide are characterized by high adhesive strength of adherence to the substrate. Thermal annealing of coated samples was performed at temperatures of 900-1200◦ C. It was determined that the microhardness of zirconium dioxide coatings increases by 10-25% depending on the annealing temperature after annealing. The results of nanoindentation showed that the nanohardness of the coatings after annealing at 1000◦ C increases by 50%. It was determined that after annealing at 1000◦ C, the elastic modulus of the coatings increases, which indicates a decrease in plasticity and an increase in the strength of the coatings. X-ray diffraction analysis showed that the phase composition of coatings before and after annealing consists of t-ZrO2. After annealing occurs there is an increase in the degree of t-ZrO2 tetragonality. Electron microscopic analysis showed that an increase in the number and size of micro-continuity in the form of thin layers after annealing. Determined that increase the hardness of zirconium dioxide after annealing at 900-1200◦ C is associated with a higher degree of tetragonality t-ZrO2 phase.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44391712","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}
Pub Date : 2020-12-25DOI: 10.29317/ejpfm.2020040403
A. Kozlovskiy
The work presents study results of the applicability of high-temperature heat treatment (500-700°C) of nitride ceramics irradiated with protons with an energy of 1.5 MeV and a dose of 10 16 cm−2 . It was found that heat treatment for 60 minutes at a temperature of 700°C allows us to significantly reduce the density of radiation-induced defects and distortions in ceramics structure due to partial annihilation and relaxation of point defects. Dependences of changes in the strength and mechanical characteristics of ceramics on the temperature of post-irradiation annealing are shown. Based on the data obtained, a conclusion was made about prospects of using post-irradiation annealing to maintain the strength of ceramics subjected to loading during operation.
{"title":"Investigation of the applicability of post-irradiation annealing to reduce the degree of disorder in AlN ceramic to proton irradiation","authors":"A. Kozlovskiy","doi":"10.29317/ejpfm.2020040403","DOIUrl":"https://doi.org/10.29317/ejpfm.2020040403","url":null,"abstract":"The work presents study results of the applicability of high-temperature heat treatment (500-700°C) of nitride ceramics irradiated with protons with an energy of 1.5 MeV and a dose of 10 16 cm−2 . It was found that heat treatment for 60 minutes at a temperature of 700°C allows us to significantly reduce the density of radiation-induced defects and distortions in ceramics structure due to partial annihilation and relaxation of point defects. Dependences of changes in the strength and mechanical characteristics of ceramics on the temperature of post-irradiation annealing are shown. Based on the data obtained, a conclusion was made about prospects of using post-irradiation annealing to maintain the strength of ceramics subjected to loading during operation.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45749061","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}