| 1. | Quantitative evaluation of the alignment degree of sintered ndfeb permanent magnets
永磁材料取向度的定量计算 |
| 2. | ( 3 ) after modification , the crystallinity and orientation of uhmwpe fiber has no obvious change , but the crystal size decreases greatly
纳米粒子的加入对纤维的取向度、结晶度基本没有影响，而纤维的晶粒尺寸大大降低。 |
| 3. | When draw down ratio was greater than 1 , the dope thread in the air gap was axially drawn with the rising of orientation degree so the fiber tenacity was strengthened
在喷头拉伸比大于1的情况下，原液细流在空气层中得到轴向拉伸，加大了初生纤维的取向度，所以纤维强度得到加强。 |
| 4. | The former will destroy the protection of hydrogen and result in oxidation of the magnetic powder , eventually decreasing the magnetic energy product . but the latter will decrease the alignment of sintered magnets
前者会失去氢的保护，导致磁粉氧化，磁能积下降；后者会影响烧结磁体的最终取向度。 |
| 5. | The results indicate that : ( 1 ) as the drawing ratio increase , the mechanical properties , crystallinity and orientation of uhmwpe fiber all increase greatly , while the average crystal size decreases
结果表明:随拉伸的进行， uhm筋胭e纤维的力学性能、结晶度、取向度均大大提高，而晶粒尺寸逐渐变小。 |
| 6. | While polyester fiber is subject to different draw ratio and heating temperature during high speed spin - fling , its original molecular orientation and crystallinity of polyester fiber are changed
摘要聚酯在高速纺丝过程中，施以不同的拉伸倍数与温度，会造成纤维结晶度与取向度的变化，从而影响纤维的物理性能。 |
| 7. | The results show that the carbon / carbon composites with rough lamina have preferred orientation , higher anisotropy and graphitization degree than the carbon / carbon composites with smooth lamina
结果表明：具有粗糙层热解炭的炭炭刹车副由于其晶格结构较为完善，生长组织择优取向度和各向异性度均高于含有光滑层结构热解炭的炭炭刹车副。 |
| 8. | It have also quined the finding that the beraking strength and the sonic modulus , increases , the compliance and the breaking elongation decreases as the sonic velocity orientation factor increases under otherwise equal condition
同时还发现：真丝新材料的强度和声速模量都随大分子取向度的增加而增大，而柔量和伸度却随取向因子的增加而降低。 |
| 9. | When polyester fiber is subject to different draw ratio and heating temperature during high speed spinning , it will result in changes of the original molecular orientation and crystallinity of the fiber , thus affecting its physical properties
摘要在高速纺丝过程中对聚酯施以不同的拉伸倍数与温度，会造成纤维结晶度与取向度的变化，从而影响纤维的物理性能。 |
| 10. | The main reason are as following : on one hand , the nd - rich phases in the hydrogen desorpted powders is so brittle that they are easily milled too fine and some are run off seriously , and then inducing low density . on the other hand , the alignment of the magnets prepared by hydrogen desorption are much low . so the hydrogen desorption process should be modified , and the solution methods can be the substitution of traditional ingots with strip cast , the enhancement of the alignment magnetic field and the addition of nd - rich phase or ( and ) lubricant before the press
主要原因是hd磁粉中的富钕相较脆，在球磨时容易被磨成超细粉而造成过量流失和使磁体烧结不够致密；另外一个原因是hd法烧结磁体的易磁化轴的取向度较低，为了提高hd磁体的b _ r和( bh ) _ ( max )可对hd工艺进行改进，改进的方法可以是用铸片代替铸锭，提高成型磁场强度以及在磁粉成型前加富钕相和润滑剂。 |
