Silicon was added to improve the tensile, wear and creep behaviors of AM60 magnesium alloy in this study. The investigation has been undertaken by means of universal testing machine, HBE-3000A Brinell hardness tester,...Silicon was added to improve the tensile, wear and creep behaviors of AM60 magnesium alloy in this study. The investigation has been undertaken by means of universal testing machine, HBE-3000A Brinell hardness tester, M-2000 friction-wear machine, DMA-Q800 creep machine, optical microscopy (OM) and scanning electron microscopy (SEM). The results indicate that the Chinese script type Mg2Si particles are formed by adding Si into the AM60 magnesium alloy. The ultimate tensile strength and hardness of the AM60 magnesium alloy increases with the Si addition, and the ultimate tensile strength and hardness of the AM60+1.0wt.%Si alloy are increased by 12% and 19.8%, respectively in comparison with that of the AM60 magnesium alloy. The wear property and the high temperature creep property of the AM60 magnesium alloy are also improved with Si addition. The wear mechanisms of the AM60 and AM60+1.0wt.%Si alloys are adhesive wear and abrasion wear, respectively. While, the elongation of the AM60 magnesium alloy decreases with the addition of Si. The optimum Si addition content is 1.0wt.%.展开更多
A lead-free base glaze suitable for pearlescent pigments was prepared by a low-temperature solid-phase reaction with alkali waste.Tests were performed to evaluate the effects of the sintering conditions and alkali was...A lead-free base glaze suitable for pearlescent pigments was prepared by a low-temperature solid-phase reaction with alkali waste.Tests were performed to evaluate the effects of the sintering conditions and alkali waste composition on the prepared base glaze and pearlescent glaze.The experimental results show that partially replacing SiO_(2) with B_(2)O_(3) effectively reduced the sintering temperature and time to form a glass network,but the network structure becomes disconnected as the B_(2)O_(3) content increases.An amorphous base glaze was obtained when soda ash was replaced with a small amount of alkali waste,but increasing the addition of NaCl further was adverse to base glaze formation by resulting in crystallization of the base glaze and a decrease in the bridging oxygen content.The pearlescent pigment was thermally stable in the glaze at 750℃,while higher temperatures caused the crystalline phase of NaAlSiO_(4) to appear and adhere to the surface of pigment granules,which degraded the pearlescent effect of the glaze.展开更多
Purpose:To investigate the knowledge and behaviours on foot self-care in patients with type 2 diabetes mellitus;analyse the influential factors,and provide information for the intervention study.Methods:A total of 596...Purpose:To investigate the knowledge and behaviours on foot self-care in patients with type 2 diabetes mellitus;analyse the influential factors,and provide information for the intervention study.Methods:A total of 5961 patients with type 2 diabetes mellitus from 144 hospitals in China were included in the study.The investigation content included patients'demographic data,foot self-care knowledge and behaviours.The investigation tools were the questionnaires on the general diabetes information,on the foot self-care knowledge,and on the foot selfcare behaviours.Results:The foot self-care knowledge was medium and the foot self-care behaviour was poor.The status of knowledge and behaviours were influenced by education,duration of diabetes mellitus,periodic inspection,and education about diabetic complications.Pearson analysis demonstrated that there was positive correlation between knowledge score and behaviour score(r?0.27,p<0.001).Conclusions:The status of foot self-care knowledge and behaviours are not optimistic.According to the patients'own characteristics,the theory of knowledge,attitude and practice applies to encouraging patients to go for periodic inspection and education about diabetic complications so as to enhance the knowledge and promote the self-care behaviours.展开更多
With the rapid development of medical departments in recent years, nursing subspecialization has increased in prominence and performance. This highly subspecialized division of labor system not only improves the quali...With the rapid development of medical departments in recent years, nursing subspecialization has increased in prominence and performance. This highly subspecialized division of labor system not only improves the quality of nursing care but also promotes the development of nursing science. Today,developing nursing subspecialization has become the direction and strategy for the development of clinical nursing practice in many countries.展开更多
基金supported by the Key Laboratory of Ministry of Education for Conveyance and Equipment (East China Jiaotong University)the Science Funds of Education Department of Jiangxi Province, China (GJJ11094)
文摘Silicon was added to improve the tensile, wear and creep behaviors of AM60 magnesium alloy in this study. The investigation has been undertaken by means of universal testing machine, HBE-3000A Brinell hardness tester, M-2000 friction-wear machine, DMA-Q800 creep machine, optical microscopy (OM) and scanning electron microscopy (SEM). The results indicate that the Chinese script type Mg2Si particles are formed by adding Si into the AM60 magnesium alloy. The ultimate tensile strength and hardness of the AM60 magnesium alloy increases with the Si addition, and the ultimate tensile strength and hardness of the AM60+1.0wt.%Si alloy are increased by 12% and 19.8%, respectively in comparison with that of the AM60 magnesium alloy. The wear property and the high temperature creep property of the AM60 magnesium alloy are also improved with Si addition. The wear mechanisms of the AM60 and AM60+1.0wt.%Si alloys are adhesive wear and abrasion wear, respectively. While, the elongation of the AM60 magnesium alloy decreases with the addition of Si. The optimum Si addition content is 1.0wt.%.
基金by the National Natural Science Foundation of China(No.51402097)the College Students Innovation and Entrepreneurship Training Program of Hubei University of Technology(No.202010500045)。
文摘A lead-free base glaze suitable for pearlescent pigments was prepared by a low-temperature solid-phase reaction with alkali waste.Tests were performed to evaluate the effects of the sintering conditions and alkali waste composition on the prepared base glaze and pearlescent glaze.The experimental results show that partially replacing SiO_(2) with B_(2)O_(3) effectively reduced the sintering temperature and time to form a glass network,but the network structure becomes disconnected as the B_(2)O_(3) content increases.An amorphous base glaze was obtained when soda ash was replaced with a small amount of alkali waste,but increasing the addition of NaCl further was adverse to base glaze formation by resulting in crystallization of the base glaze and a decrease in the bridging oxygen content.The pearlescent pigment was thermally stable in the glaze at 750℃,while higher temperatures caused the crystalline phase of NaAlSiO_(4) to appear and adhere to the surface of pigment granules,which degraded the pearlescent effect of the glaze.
文摘Purpose:To investigate the knowledge and behaviours on foot self-care in patients with type 2 diabetes mellitus;analyse the influential factors,and provide information for the intervention study.Methods:A total of 5961 patients with type 2 diabetes mellitus from 144 hospitals in China were included in the study.The investigation content included patients'demographic data,foot self-care knowledge and behaviours.The investigation tools were the questionnaires on the general diabetes information,on the foot self-care knowledge,and on the foot selfcare behaviours.Results:The foot self-care knowledge was medium and the foot self-care behaviour was poor.The status of knowledge and behaviours were influenced by education,duration of diabetes mellitus,periodic inspection,and education about diabetic complications.Pearson analysis demonstrated that there was positive correlation between knowledge score and behaviour score(r?0.27,p<0.001).Conclusions:The status of foot self-care knowledge and behaviours are not optimistic.According to the patients'own characteristics,the theory of knowledge,attitude and practice applies to encouraging patients to go for periodic inspection and education about diabetic complications so as to enhance the knowledge and promote the self-care behaviours.
文摘With the rapid development of medical departments in recent years, nursing subspecialization has increased in prominence and performance. This highly subspecialized division of labor system not only improves the quality of nursing care but also promotes the development of nursing science. Today,developing nursing subspecialization has become the direction and strategy for the development of clinical nursing practice in many countries.
